diff --git a/assets/javascripts/vendor/prism.js b/assets/javascripts/vendor/prism.js
index 2f830fe4..8fc99771 100644
--- a/assets/javascripts/vendor/prism.js
+++ b/assets/javascripts/vendor/prism.js
@@ -1,13 +1,13 @@
 /* PrismJS 1.23.0
-https://prismjs.com/download.html#themes=prism&languages=markup+css+clike+javascript+bash+c+cpp+coffeescript+crystal+d+dart+diff+django+elixir+erlang+go+groovy+java+json+julia+kotlin+lua+markup-templating+matlab+nginx+nim+ocaml+perl+php+python+jsx+ruby+rust+scss+shell-session+sql+typescript+yaml */
+https://prismjs.com/download.html#themes=prism&languages=markup+css+clike+javascript+bash+c+cpp+coffeescript+crystal+d+dart+diff+django+elixir+erlang+go+groovy+java+json+julia+kotlin+latex+lua+markup-templating+matlab+nginx+nim+ocaml+perl+php+python+jsx+ruby+rust+scss+shell-session+sql+typescript+yaml */
 /// <reference lib="WebWorker"/>
 
 var _self = (typeof window !== 'undefined')
 	? window   // if in browser
 	: (
 		(typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
-		? self // if in worker
-		: {}   // if in node js
+			? self // if in worker
+			: {}   // if in node js
 	);
 
 /**
@@ -18,1133 +18,1151 @@ var _self = (typeof window !== 'undefined')
  * @namespace
  * @public
  */
-var Prism = (function (_self){
+var Prism = (function (_self) {
 
-// Private helper vars
-var lang = /\blang(?:uage)?-([\w-]+)\b/i;
-var uniqueId = 0;
+	// Private helper vars
+	var lang = /\blang(?:uage)?-([\w-]+)\b/i;
+	var uniqueId = 0;
 
+	// The grammar object for plaintext
+	var plainTextGrammar = {};
 
-var _ = {
-	/**
-	 * By default, Prism will attempt to highlight all code elements (by calling {@link Prism.highlightAll}) on the
-	 * current page after the page finished loading. This might be a problem if e.g. you wanted to asynchronously load
-	 * additional languages or plugins yourself.
-	 *
-	 * By setting this value to `true`, Prism will not automatically highlight all code elements on the page.
-	 *
-	 * You obviously have to change this value before the automatic highlighting started. To do this, you can add an
-	 * empty Prism object into the global scope before loading the Prism script like this:
-	 *
-	 * ```js
-	 * window.Prism = window.Prism || {};
-	 * Prism.manual = true;
-	 * // add a new <script> to load Prism's script
-	 * ```
-	 *
-	 * @default false
-	 * @type {boolean}
-	 * @memberof Prism
-	 * @public
-	 */
-	manual: _self.Prism && _self.Prism.manual,
-	disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
-
-	/**
-	 * A namespace for utility methods.
-	 *
-	 * All function in this namespace that are not explicitly marked as _public_ are for __internal use only__ and may
-	 * change or disappear at any time.
-	 *
-	 * @namespace
-	 * @memberof Prism
-	 */
-	util: {
-		encode: function encode(tokens) {
-			if (tokens instanceof Token) {
-				return new Token(tokens.type, encode(tokens.content), tokens.alias);
-			} else if (Array.isArray(tokens)) {
-				return tokens.map(encode);
-			} else {
-				return tokens.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/\u00a0/g, ' ');
-			}
-		},
 
+	var _ = {
 		/**
-		 * Returns the name of the type of the given value.
+		 * By default, Prism will attempt to highlight all code elements (by calling {@link Prism.highlightAll}) on the
+		 * current page after the page finished loading. This might be a problem if e.g. you wanted to asynchronously load
+		 * additional languages or plugins yourself.
 		 *
-		 * @param {any} o
-		 * @returns {string}
-		 * @example
-		 * type(null)      === 'Null'
-		 * type(undefined) === 'Undefined'
-		 * type(123)       === 'Number'
-		 * type('foo')     === 'String'
-		 * type(true)      === 'Boolean'
-		 * type([1, 2])    === 'Array'
-		 * type({})        === 'Object'
-		 * type(String)    === 'Function'
-		 * type(/abc+/)    === 'RegExp'
-		 */
-		type: function (o) {
-			return Object.prototype.toString.call(o).slice(8, -1);
-		},
-
-		/**
-		 * Returns a unique number for the given object. Later calls will still return the same number.
+		 * By setting this value to `true`, Prism will not automatically highlight all code elements on the page.
+		 *
+		 * You obviously have to change this value before the automatic highlighting started. To do this, you can add an
+		 * empty Prism object into the global scope before loading the Prism script like this:
 		 *
-		 * @param {Object} obj
-		 * @returns {number}
+		 * ```js
+		 * window.Prism = window.Prism || {};
+		 * Prism.manual = true;
+		 * // add a new <script> to load Prism's script
+		 * ```
+		 *
+		 * @default false
+		 * @type {boolean}
+		 * @memberof Prism
+		 * @public
 		 */
-		objId: function (obj) {
-			if (!obj['__id']) {
-				Object.defineProperty(obj, '__id', { value: ++uniqueId });
-			}
-			return obj['__id'];
-		},
+		manual: _self.Prism && _self.Prism.manual,
+		disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
 
 		/**
-		 * Creates a deep clone of the given object.
+		 * A namespace for utility methods.
 		 *
-		 * The main intended use of this function is to clone language definitions.
+		 * All function in this namespace that are not explicitly marked as _public_ are for __internal use only__ and may
+		 * change or disappear at any time.
 		 *
-		 * @param {T} o
-		 * @param {Record<number, any>} [visited]
-		 * @returns {T}
-		 * @template T
+		 * @namespace
+		 * @memberof Prism
 		 */
-		clone: function deepClone(o, visited) {
-			visited = visited || {};
-
-			var clone, id;
-			switch (_.util.type(o)) {
-				case 'Object':
-					id = _.util.objId(o);
-					if (visited[id]) {
-						return visited[id];
-					}
-					clone = /** @type {Record<string, any>} */ ({});
-					visited[id] = clone;
+		util: {
+			encode: function encode(tokens) {
+				if (tokens instanceof Token) {
+					return new Token(tokens.type, encode(tokens.content), tokens.alias);
+				} else if (Array.isArray(tokens)) {
+					return tokens.map(encode);
+				} else {
+					return tokens.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/\u00a0/g, ' ');
+				}
+			},
+
+			/**
+			 * Returns the name of the type of the given value.
+			 *
+			 * @param {any} o
+			 * @returns {string}
+			 * @example
+			 * type(null)      === 'Null'
+			 * type(undefined) === 'Undefined'
+			 * type(123)       === 'Number'
+			 * type('foo')     === 'String'
+			 * type(true)      === 'Boolean'
+			 * type([1, 2])    === 'Array'
+			 * type({})        === 'Object'
+			 * type(String)    === 'Function'
+			 * type(/abc+/)    === 'RegExp'
+			 */
+			type: function (o) {
+				return Object.prototype.toString.call(o).slice(8, -1);
+			},
+
+			/**
+			 * Returns a unique number for the given object. Later calls will still return the same number.
+			 *
+			 * @param {Object} obj
+			 * @returns {number}
+			 */
+			objId: function (obj) {
+				if (!obj['__id']) {
+					Object.defineProperty(obj, '__id', { value: ++uniqueId });
+				}
+				return obj['__id'];
+			},
 
-					for (var key in o) {
-						if (o.hasOwnProperty(key)) {
-							clone[key] = deepClone(o[key], visited);
+			/**
+			 * Creates a deep clone of the given object.
+			 *
+			 * The main intended use of this function is to clone language definitions.
+			 *
+			 * @param {T} o
+			 * @param {Record<number, any>} [visited]
+			 * @returns {T}
+			 * @template T
+			 */
+			clone: function deepClone(o, visited) {
+				visited = visited || {};
+
+				var clone; var id;
+				switch (_.util.type(o)) {
+					case 'Object':
+						id = _.util.objId(o);
+						if (visited[id]) {
+							return visited[id];
 						}
-					}
+						clone = /** @type {Record<string, any>} */ ({});
+						visited[id] = clone;
 
-					return /** @type {any} */ (clone);
+						for (var key in o) {
+							if (o.hasOwnProperty(key)) {
+								clone[key] = deepClone(o[key], visited);
+							}
+						}
 
-				case 'Array':
-					id = _.util.objId(o);
-					if (visited[id]) {
-						return visited[id];
-					}
-					clone = [];
-					visited[id] = clone;
+						return /** @type {any} */ (clone);
 
-					(/** @type {Array} */(/** @type {any} */(o))).forEach(function (v, i) {
-						clone[i] = deepClone(v, visited);
-					});
+					case 'Array':
+						id = _.util.objId(o);
+						if (visited[id]) {
+							return visited[id];
+						}
+						clone = [];
+						visited[id] = clone;
 
-					return /** @type {any} */ (clone);
+						(/** @type {Array} */(/** @type {any} */(o))).forEach(function (v, i) {
+							clone[i] = deepClone(v, visited);
+						});
 
-				default:
-					return o;
-			}
-		},
+						return /** @type {any} */ (clone);
 
-		/**
-		 * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
-		 *
-		 * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
-		 *
-		 * @param {Element} element
-		 * @returns {string}
-		 */
-		getLanguage: function (element) {
-			while (element && !lang.test(element.className)) {
-				element = element.parentElement;
-			}
-			if (element) {
-				return (element.className.match(lang) || [, 'none'])[1].toLowerCase();
-			}
-			return 'none';
-		},
+					default:
+						return o;
+				}
+			},
 
-		/**
-		 * Returns the script element that is currently executing.
-		 *
-		 * This does __not__ work for line script element.
-		 *
-		 * @returns {HTMLScriptElement | null}
-		 */
-		currentScript: function () {
-			if (typeof document === 'undefined') {
-				return null;
-			}
-			if ('currentScript' in document && 1 < 2 /* hack to trip TS' flow analysis */) {
-				return /** @type {any} */ (document.currentScript);
-			}
+			/**
+			 * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
+			 *
+			 * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
+			 *
+			 * @param {Element} element
+			 * @returns {string}
+			 */
+			getLanguage: function (element) {
+				while (element && !lang.test(element.className)) {
+					element = element.parentElement;
+				}
+				if (element) {
+					return (element.className.match(lang) || [, 'none'])[1].toLowerCase();
+				}
+				return 'none';
+			},
 
-			// IE11 workaround
-			// we'll get the src of the current script by parsing IE11's error stack trace
-			// this will not work for inline scripts
+			/**
+			 * Returns the script element that is currently executing.
+			 *
+			 * This does __not__ work for line script element.
+			 *
+			 * @returns {HTMLScriptElement | null}
+			 */
+			currentScript: function () {
+				if (typeof document === 'undefined') {
+					return null;
+				}
+				if ('currentScript' in document && 1 < 2 /* hack to trip TS' flow analysis */) {
+					return /** @type {any} */ (document.currentScript);
+				}
 
-			try {
-				throw new Error();
-			} catch (err) {
-				// Get file src url from stack. Specifically works with the format of stack traces in IE.
-				// A stack will look like this:
-				//
-				// Error
-				//    at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
-				//    at Global code (http://localhost/components/prism-core.js:606:1)
-
-				var src = (/at [^(\r\n]*\((.*):.+:.+\)$/i.exec(err.stack) || [])[1];
-				if (src) {
-					var scripts = document.getElementsByTagName('script');
-					for (var i in scripts) {
-						if (scripts[i].src == src) {
-							return scripts[i];
+				// IE11 workaround
+				// we'll get the src of the current script by parsing IE11's error stack trace
+				// this will not work for inline scripts
+
+				try {
+					throw new Error();
+				} catch (err) {
+					// Get file src url from stack. Specifically works with the format of stack traces in IE.
+					// A stack will look like this:
+					//
+					// Error
+					//    at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
+					//    at Global code (http://localhost/components/prism-core.js:606:1)
+
+					var src = (/at [^(\r\n]*\((.*):.+:.+\)$/i.exec(err.stack) || [])[1];
+					if (src) {
+						var scripts = document.getElementsByTagName('script');
+						for (var i in scripts) {
+							if (scripts[i].src == src) {
+								return scripts[i];
+							}
 						}
 					}
+					return null;
+				}
+			},
+
+			/**
+			 * Returns whether a given class is active for `element`.
+			 *
+			 * The class can be activated if `element` or one of its ancestors has the given class and it can be deactivated
+			 * if `element` or one of its ancestors has the negated version of the given class. The _negated version_ of the
+			 * given class is just the given class with a `no-` prefix.
+			 *
+			 * Whether the class is active is determined by the closest ancestor of `element` (where `element` itself is
+			 * closest ancestor) that has the given class or the negated version of it. If neither `element` nor any of its
+			 * ancestors have the given class or the negated version of it, then the default activation will be returned.
+			 *
+			 * In the paradoxical situation where the closest ancestor contains __both__ the given class and the negated
+			 * version of it, the class is considered active.
+			 *
+			 * @param {Element} element
+			 * @param {string} className
+			 * @param {boolean} [defaultActivation=false]
+			 * @returns {boolean}
+			 */
+			isActive: function (element, className, defaultActivation) {
+				var no = 'no-' + className;
+
+				while (element) {
+					var classList = element.classList;
+					if (classList.contains(className)) {
+						return true;
+					}
+					if (classList.contains(no)) {
+						return false;
+					}
+					element = element.parentElement;
 				}
-				return null;
+				return !!defaultActivation;
 			}
 		},
 
 		/**
-		 * Returns whether a given class is active for `element`.
+		 * This namespace contains all currently loaded languages and the some helper functions to create and modify languages.
 		 *
-		 * The class can be activated if `element` or one of its ancestors has the given class and it can be deactivated
-		 * if `element` or one of its ancestors has the negated version of the given class. The _negated version_ of the
-		 * given class is just the given class with a `no-` prefix.
-		 *
-		 * Whether the class is active is determined by the closest ancestor of `element` (where `element` itself is
-		 * closest ancestor) that has the given class or the negated version of it. If neither `element` nor any of its
-		 * ancestors have the given class or the negated version of it, then the default activation will be returned.
-		 *
-		 * In the paradoxical situation where the closest ancestor contains __both__ the given class and the negated
-		 * version of it, the class is considered active.
-		 *
-		 * @param {Element} element
-		 * @param {string} className
-		 * @param {boolean} [defaultActivation=false]
-		 * @returns {boolean}
+		 * @namespace
+		 * @memberof Prism
+		 * @public
 		 */
-		isActive: function (element, className, defaultActivation) {
-			var no = 'no-' + className;
+		languages: {
+			/**
+			 * The grammar for plain, unformatted text.
+			 */
+			plain: plainTextGrammar,
+			plaintext: plainTextGrammar,
+			text: plainTextGrammar,
+			txt: plainTextGrammar,
 
-			while (element) {
-				var classList = element.classList;
-				if (classList.contains(className)) {
-					return true;
+			/**
+			 * Creates a deep copy of the language with the given id and appends the given tokens.
+			 *
+			 * If a token in `redef` also appears in the copied language, then the existing token in the copied language
+			 * will be overwritten at its original position.
+			 *
+			 * ## Best practices
+			 *
+			 * Since the position of overwriting tokens (token in `redef` that overwrite tokens in the copied language)
+			 * doesn't matter, they can technically be in any order. However, this can be confusing to others that trying to
+			 * understand the language definition because, normally, the order of tokens matters in Prism grammars.
+			 *
+			 * Therefore, it is encouraged to order overwriting tokens according to the positions of the overwritten tokens.
+			 * Furthermore, all non-overwriting tokens should be placed after the overwriting ones.
+			 *
+			 * @param {string} id The id of the language to extend. This has to be a key in `Prism.languages`.
+			 * @param {Grammar} redef The new tokens to append.
+			 * @returns {Grammar} The new language created.
+			 * @public
+			 * @example
+			 * Prism.languages['css-with-colors'] = Prism.languages.extend('css', {
+			 *     // Prism.languages.css already has a 'comment' token, so this token will overwrite CSS' 'comment' token
+			 *     // at its original position
+			 *     'comment': { ... },
+			 *     // CSS doesn't have a 'color' token, so this token will be appended
+			 *     'color': /\b(?:red|green|blue)\b/
+			 * });
+			 */
+			extend: function (id, redef) {
+				var lang = _.util.clone(_.languages[id]);
+
+				for (var key in redef) {
+					lang[key] = redef[key];
+				}
+
+				return lang;
+			},
+
+			/**
+			 * Inserts tokens _before_ another token in a language definition or any other grammar.
+			 *
+			 * ## Usage
+			 *
+			 * This helper method makes it easy to modify existing languages. For example, the CSS language definition
+			 * not only defines CSS highlighting for CSS documents, but also needs to define highlighting for CSS embedded
+			 * in HTML through `<style>` elements. To do this, it needs to modify `Prism.languages.markup` and add the
+			 * appropriate tokens. However, `Prism.languages.markup` is a regular JavaScript object literal, so if you do
+			 * this:
+			 *
+			 * ```js
+			 * Prism.languages.markup.style = {
+			 *     // token
+			 * };
+			 * ```
+			 *
+			 * then the `style` token will be added (and processed) at the end. `insertBefore` allows you to insert tokens
+			 * before existing tokens. For the CSS example above, you would use it like this:
+			 *
+			 * ```js
+			 * Prism.languages.insertBefore('markup', 'cdata', {
+			 *     'style': {
+			 *         // token
+			 *     }
+			 * });
+			 * ```
+			 *
+			 * ## Special cases
+			 *
+			 * If the grammars of `inside` and `insert` have tokens with the same name, the tokens in `inside`'s grammar
+			 * will be ignored.
+			 *
+			 * This behavior can be used to insert tokens after `before`:
+			 *
+			 * ```js
+			 * Prism.languages.insertBefore('markup', 'comment', {
+			 *     'comment': Prism.languages.markup.comment,
+			 *     // tokens after 'comment'
+			 * });
+			 * ```
+			 *
+			 * ## Limitations
+			 *
+			 * The main problem `insertBefore` has to solve is iteration order. Since ES2015, the iteration order for object
+			 * properties is guaranteed to be the insertion order (except for integer keys) but some browsers behave
+			 * differently when keys are deleted and re-inserted. So `insertBefore` can't be implemented by temporarily
+			 * deleting properties which is necessary to insert at arbitrary positions.
+			 *
+			 * To solve this problem, `insertBefore` doesn't actually insert the given tokens into the target object.
+			 * Instead, it will create a new object and replace all references to the target object with the new one. This
+			 * can be done without temporarily deleting properties, so the iteration order is well-defined.
+			 *
+			 * However, only references that can be reached from `Prism.languages` or `insert` will be replaced. I.e. if
+			 * you hold the target object in a variable, then the value of the variable will not change.
+			 *
+			 * ```js
+			 * var oldMarkup = Prism.languages.markup;
+			 * var newMarkup = Prism.languages.insertBefore('markup', 'comment', { ... });
+			 *
+			 * assert(oldMarkup !== Prism.languages.markup);
+			 * assert(newMarkup === Prism.languages.markup);
+			 * ```
+			 *
+			 * @param {string} inside The property of `root` (e.g. a language id in `Prism.languages`) that contains the
+			 * object to be modified.
+			 * @param {string} before The key to insert before.
+			 * @param {Grammar} insert An object containing the key-value pairs to be inserted.
+			 * @param {Object<string, any>} [root] The object containing `inside`, i.e. the object that contains the
+			 * object to be modified.
+			 *
+			 * Defaults to `Prism.languages`.
+			 * @returns {Grammar} The new grammar object.
+			 * @public
+			 */
+			insertBefore: function (inside, before, insert, root) {
+				root = root || /** @type {any} */ (_.languages);
+				var grammar = root[inside];
+				/** @type {Grammar} */
+				var ret = {};
+
+				for (var token in grammar) {
+					if (grammar.hasOwnProperty(token)) {
+
+						if (token == before) {
+							for (var newToken in insert) {
+								if (insert.hasOwnProperty(newToken)) {
+									ret[newToken] = insert[newToken];
+								}
+							}
+						}
+
+						// Do not insert token which also occur in insert. See #1525
+						if (!insert.hasOwnProperty(token)) {
+							ret[token] = grammar[token];
+						}
+					}
 				}
-				if (classList.contains(no)) {
-					return false;
+
+				var old = root[inside];
+				root[inside] = ret;
+
+				// Update references in other language definitions
+				_.languages.DFS(_.languages, function (key, value) {
+					if (value === old && key != inside) {
+						this[key] = ret;
+					}
+				});
+
+				return ret;
+			},
+
+			// Traverse a language definition with Depth First Search
+			DFS: function DFS(o, callback, type, visited) {
+				visited = visited || {};
+
+				var objId = _.util.objId;
+
+				for (var i in o) {
+					if (o.hasOwnProperty(i)) {
+						callback.call(o, i, o[i], type || i);
+
+						var property = o[i];
+						var propertyType = _.util.type(property);
+
+						if (propertyType === 'Object' && !visited[objId(property)]) {
+							visited[objId(property)] = true;
+							DFS(property, callback, null, visited);
+						} else if (propertyType === 'Array' && !visited[objId(property)]) {
+							visited[objId(property)] = true;
+							DFS(property, callback, i, visited);
+						}
+					}
 				}
-				element = element.parentElement;
 			}
-			return !!defaultActivation;
-		}
-	},
+		},
+
+		plugins: {},
 
-	/**
-	 * This namespace contains all currently loaded languages and the some helper functions to create and modify languages.
-	 *
-	 * @namespace
-	 * @memberof Prism
-	 * @public
-	 */
-	languages: {
 		/**
-		 * Creates a deep copy of the language with the given id and appends the given tokens.
+		 * This is the most high-level function in Prism’s API.
+		 * It fetches all the elements that have a `.language-xxxx` class and then calls {@link Prism.highlightElement} on
+		 * each one of them.
 		 *
-		 * If a token in `redef` also appears in the copied language, then the existing token in the copied language
-		 * will be overwritten at its original position.
+		 * This is equivalent to `Prism.highlightAllUnder(document, async, callback)`.
 		 *
-		 * ## Best practices
-		 *
-		 * Since the position of overwriting tokens (token in `redef` that overwrite tokens in the copied language)
-		 * doesn't matter, they can technically be in any order. However, this can be confusing to others that trying to
-		 * understand the language definition because, normally, the order of tokens matters in Prism grammars.
+		 * @param {boolean} [async=false] Same as in {@link Prism.highlightAllUnder}.
+		 * @param {HighlightCallback} [callback] Same as in {@link Prism.highlightAllUnder}.
+		 * @memberof Prism
+		 * @public
+		 */
+		highlightAll: function (async, callback) {
+			_.highlightAllUnder(document, async, callback);
+		},
+
+		/**
+		 * Fetches all the descendants of `container` that have a `.language-xxxx` class and then calls
+		 * {@link Prism.highlightElement} on each one of them.
 		 *
-		 * Therefore, it is encouraged to order overwriting tokens according to the positions of the overwritten tokens.
-		 * Furthermore, all non-overwriting tokens should be placed after the overwriting ones.
+		 * The following hooks will be run:
+		 * 1. `before-highlightall`
+		 * 2. `before-all-elements-highlight`
+		 * 3. All hooks of {@link Prism.highlightElement} for each element.
 		 *
-		 * @param {string} id The id of the language to extend. This has to be a key in `Prism.languages`.
-		 * @param {Grammar} redef The new tokens to append.
-		 * @returns {Grammar} The new language created.
+		 * @param {ParentNode} container The root element, whose descendants that have a `.language-xxxx` class will be highlighted.
+		 * @param {boolean} [async=false] Whether each element is to be highlighted asynchronously using Web Workers.
+		 * @param {HighlightCallback} [callback] An optional callback to be invoked on each element after its highlighting is done.
+		 * @memberof Prism
 		 * @public
-		 * @example
-		 * Prism.languages['css-with-colors'] = Prism.languages.extend('css', {
-		 *     // Prism.languages.css already has a 'comment' token, so this token will overwrite CSS' 'comment' token
-		 *     // at its original position
-		 *     'comment': { ... },
-		 *     // CSS doesn't have a 'color' token, so this token will be appended
-		 *     'color': /\b(?:red|green|blue)\b/
-		 * });
 		 */
-		extend: function (id, redef) {
-			var lang = _.util.clone(_.languages[id]);
+		highlightAllUnder: function (container, async, callback) {
+			var env = {
+				callback: callback,
+				container: container,
+				selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
+			};
 
-			for (var key in redef) {
-				lang[key] = redef[key];
-			}
+			_.hooks.run('before-highlightall', env);
 
-			return lang;
+			env.elements = Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));
+
+			_.hooks.run('before-all-elements-highlight', env);
+
+			for (var i = 0, element; (element = env.elements[i++]);) {
+				_.highlightElement(element, async === true, env.callback);
+			}
 		},
 
 		/**
-		 * Inserts tokens _before_ another token in a language definition or any other grammar.
-		 *
-		 * ## Usage
-		 *
-		 * This helper method makes it easy to modify existing languages. For example, the CSS language definition
-		 * not only defines CSS highlighting for CSS documents, but also needs to define highlighting for CSS embedded
-		 * in HTML through `<style>` elements. To do this, it needs to modify `Prism.languages.markup` and add the
-		 * appropriate tokens. However, `Prism.languages.markup` is a regular JavaScript object literal, so if you do
-		 * this:
-		 *
-		 * ```js
-		 * Prism.languages.markup.style = {
-		 *     // token
-		 * };
-		 * ```
-		 *
-		 * then the `style` token will be added (and processed) at the end. `insertBefore` allows you to insert tokens
-		 * before existing tokens. For the CSS example above, you would use it like this:
-		 *
-		 * ```js
-		 * Prism.languages.insertBefore('markup', 'cdata', {
-		 *     'style': {
-		 *         // token
-		 *     }
-		 * });
-		 * ```
-		 *
-		 * ## Special cases
-		 *
-		 * If the grammars of `inside` and `insert` have tokens with the same name, the tokens in `inside`'s grammar
-		 * will be ignored.
-		 *
-		 * This behavior can be used to insert tokens after `before`:
-		 *
-		 * ```js
-		 * Prism.languages.insertBefore('markup', 'comment', {
-		 *     'comment': Prism.languages.markup.comment,
-		 *     // tokens after 'comment'
-		 * });
-		 * ```
-		 *
-		 * ## Limitations
-		 *
-		 * The main problem `insertBefore` has to solve is iteration order. Since ES2015, the iteration order for object
-		 * properties is guaranteed to be the insertion order (except for integer keys) but some browsers behave
-		 * differently when keys are deleted and re-inserted. So `insertBefore` can't be implemented by temporarily
-		 * deleting properties which is necessary to insert at arbitrary positions.
-		 *
-		 * To solve this problem, `insertBefore` doesn't actually insert the given tokens into the target object.
-		 * Instead, it will create a new object and replace all references to the target object with the new one. This
-		 * can be done without temporarily deleting properties, so the iteration order is well-defined.
+		 * Highlights the code inside a single element.
 		 *
-		 * However, only references that can be reached from `Prism.languages` or `insert` will be replaced. I.e. if
-		 * you hold the target object in a variable, then the value of the variable will not change.
+		 * The following hooks will be run:
+		 * 1. `before-sanity-check`
+		 * 2. `before-highlight`
+		 * 3. All hooks of {@link Prism.highlight}. These hooks will be run by an asynchronous worker if `async` is `true`.
+		 * 4. `before-insert`
+		 * 5. `after-highlight`
+		 * 6. `complete`
 		 *
-		 * ```js
-		 * var oldMarkup = Prism.languages.markup;
-		 * var newMarkup = Prism.languages.insertBefore('markup', 'comment', { ... });
-		 *
-		 * assert(oldMarkup !== Prism.languages.markup);
-		 * assert(newMarkup === Prism.languages.markup);
-		 * ```
+		 * Some the above hooks will be skipped if the element doesn't contain any text or there is no grammar loaded for
+		 * the element's language.
 		 *
-		 * @param {string} inside The property of `root` (e.g. a language id in `Prism.languages`) that contains the
-		 * object to be modified.
-		 * @param {string} before The key to insert before.
-		 * @param {Grammar} insert An object containing the key-value pairs to be inserted.
-		 * @param {Object<string, any>} [root] The object containing `inside`, i.e. the object that contains the
-		 * object to be modified.
+		 * @param {Element} element The element containing the code.
+		 * It must have a class of `language-xxxx` to be processed, where `xxxx` is a valid language identifier.
+		 * @param {boolean} [async=false] Whether the element is to be highlighted asynchronously using Web Workers
+		 * to improve performance and avoid blocking the UI when highlighting very large chunks of code. This option is
+		 * [disabled by default](https://prismjs.com/faq.html#why-is-asynchronous-highlighting-disabled-by-default).
 		 *
-		 * Defaults to `Prism.languages`.
-		 * @returns {Grammar} The new grammar object.
+		 * Note: All language definitions required to highlight the code must be included in the main `prism.js` file for
+		 * asynchronous highlighting to work. You can build your own bundle on the
+		 * [Download page](https://prismjs.com/download.html).
+		 * @param {HighlightCallback} [callback] An optional callback to be invoked after the highlighting is done.
+		 * Mostly useful when `async` is `true`, since in that case, the highlighting is done asynchronously.
+		 * @memberof Prism
 		 * @public
 		 */
-		insertBefore: function (inside, before, insert, root) {
-			root = root || /** @type {any} */ (_.languages);
-			var grammar = root[inside];
-			/** @type {Grammar} */
-			var ret = {};
-
-			for (var token in grammar) {
-				if (grammar.hasOwnProperty(token)) {
-
-					if (token == before) {
-						for (var newToken in insert) {
-							if (insert.hasOwnProperty(newToken)) {
-								ret[newToken] = insert[newToken];
-							}
-						}
-					}
-
-					// Do not insert token which also occur in insert. See #1525
-					if (!insert.hasOwnProperty(token)) {
-						ret[token] = grammar[token];
-					}
-				}
+		highlightElement: function (element, async, callback) {
+			// Find language
+			var language = _.util.getLanguage(element);
+			var grammar = _.languages[language];
+
+			// Set language on the element, if not present
+			element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
+
+			// Set language on the parent, for styling
+			var parent = element.parentElement;
+			if (parent && parent.nodeName.toLowerCase() === 'pre') {
+				parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
 			}
 
-			var old = root[inside];
-			root[inside] = ret;
+			var code = element.textContent;
 
-			// Update references in other language definitions
-			_.languages.DFS(_.languages, function(key, value) {
-				if (value === old && key != inside) {
-					this[key] = ret;
-				}
-			});
-
-			return ret;
-		},
-
-		// Traverse a language definition with Depth First Search
-		DFS: function DFS(o, callback, type, visited) {
-			visited = visited || {};
+			var env = {
+				element: element,
+				language: language,
+				grammar: grammar,
+				code: code
+			};
 
-			var objId = _.util.objId;
+			function insertHighlightedCode(highlightedCode) {
+				env.highlightedCode = highlightedCode;
 
-			for (var i in o) {
-				if (o.hasOwnProperty(i)) {
-					callback.call(o, i, o[i], type || i);
+				_.hooks.run('before-insert', env);
 
-					var property = o[i],
-					    propertyType = _.util.type(property);
+				env.element.innerHTML = env.highlightedCode;
 
-					if (propertyType === 'Object' && !visited[objId(property)]) {
-						visited[objId(property)] = true;
-						DFS(property, callback, null, visited);
-					}
-					else if (propertyType === 'Array' && !visited[objId(property)]) {
-						visited[objId(property)] = true;
-						DFS(property, callback, i, visited);
-					}
-				}
+				_.hooks.run('after-highlight', env);
+				_.hooks.run('complete', env);
+				callback && callback.call(env.element);
 			}
-		}
-	},
 
-	plugins: {},
+			_.hooks.run('before-sanity-check', env);
 
-	/**
-	 * This is the most high-level function in Prism’s API.
-	 * It fetches all the elements that have a `.language-xxxx` class and then calls {@link Prism.highlightElement} on
-	 * each one of them.
-	 *
-	 * This is equivalent to `Prism.highlightAllUnder(document, async, callback)`.
-	 *
-	 * @param {boolean} [async=false] Same as in {@link Prism.highlightAllUnder}.
-	 * @param {HighlightCallback} [callback] Same as in {@link Prism.highlightAllUnder}.
-	 * @memberof Prism
-	 * @public
-	 */
-	highlightAll: function(async, callback) {
-		_.highlightAllUnder(document, async, callback);
-	},
-
-	/**
-	 * Fetches all the descendants of `container` that have a `.language-xxxx` class and then calls
-	 * {@link Prism.highlightElement} on each one of them.
-	 *
-	 * The following hooks will be run:
-	 * 1. `before-highlightall`
-	 * 2. `before-all-elements-highlight`
-	 * 3. All hooks of {@link Prism.highlightElement} for each element.
-	 *
-	 * @param {ParentNode} container The root element, whose descendants that have a `.language-xxxx` class will be highlighted.
-	 * @param {boolean} [async=false] Whether each element is to be highlighted asynchronously using Web Workers.
-	 * @param {HighlightCallback} [callback] An optional callback to be invoked on each element after its highlighting is done.
-	 * @memberof Prism
-	 * @public
-	 */
-	highlightAllUnder: function(container, async, callback) {
-		var env = {
-			callback: callback,
-			container: container,
-			selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
-		};
-
-		_.hooks.run('before-highlightall', env);
+			// plugins may change/add the parent/element
+			parent = env.element.parentElement;
+			if (parent && parent.nodeName.toLowerCase() === 'pre' && !parent.hasAttribute('tabindex')) {
+				parent.setAttribute('tabindex', '0');
+			}
 
-		env.elements = Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));
+			if (!env.code) {
+				_.hooks.run('complete', env);
+				callback && callback.call(env.element);
+				return;
+			}
 
-		_.hooks.run('before-all-elements-highlight', env);
+			_.hooks.run('before-highlight', env);
 
-		for (var i = 0, element; element = env.elements[i++];) {
-			_.highlightElement(element, async === true, env.callback);
-		}
-	},
+			if (!env.grammar) {
+				insertHighlightedCode(_.util.encode(env.code));
+				return;
+			}
 
-	/**
-	 * Highlights the code inside a single element.
-	 *
-	 * The following hooks will be run:
-	 * 1. `before-sanity-check`
-	 * 2. `before-highlight`
-	 * 3. All hooks of {@link Prism.highlight}. These hooks will be run by an asynchronous worker if `async` is `true`.
-	 * 4. `before-insert`
-	 * 5. `after-highlight`
-	 * 6. `complete`
-	 *
-	 * Some the above hooks will be skipped if the element doesn't contain any text or there is no grammar loaded for
-	 * the element's language.
-	 *
-	 * @param {Element} element The element containing the code.
-	 * It must have a class of `language-xxxx` to be processed, where `xxxx` is a valid language identifier.
-	 * @param {boolean} [async=false] Whether the element is to be highlighted asynchronously using Web Workers
-	 * to improve performance and avoid blocking the UI when highlighting very large chunks of code. This option is
-	 * [disabled by default](https://prismjs.com/faq.html#why-is-asynchronous-highlighting-disabled-by-default).
-	 *
-	 * Note: All language definitions required to highlight the code must be included in the main `prism.js` file for
-	 * asynchronous highlighting to work. You can build your own bundle on the
-	 * [Download page](https://prismjs.com/download.html).
-	 * @param {HighlightCallback} [callback] An optional callback to be invoked after the highlighting is done.
-	 * Mostly useful when `async` is `true`, since in that case, the highlighting is done asynchronously.
-	 * @memberof Prism
-	 * @public
-	 */
-	highlightElement: function(element, async, callback) {
-		// Find language
-		var language = _.util.getLanguage(element);
-		var grammar = _.languages[language];
-
-		// Set language on the element, if not present
-		element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
-
-		// Set language on the parent, for styling
-		var parent = element.parentElement;
-		if (parent && parent.nodeName.toLowerCase() === 'pre') {
-			parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
-		}
+			if (async && _self.Worker) {
+				var worker = new Worker(_.filename);
 
-		var code = element.textContent;
+				worker.onmessage = function (evt) {
+					insertHighlightedCode(evt.data);
+				};
 
-		var env = {
-			element: element,
-			language: language,
-			grammar: grammar,
-			code: code
-		};
+				worker.postMessage(JSON.stringify({
+					language: env.language,
+					code: env.code,
+					immediateClose: true
+				}));
+			} else {
+				insertHighlightedCode(_.highlight(env.code, env.grammar, env.language));
+			}
+		},
 
-		function insertHighlightedCode(highlightedCode) {
-			env.highlightedCode = highlightedCode;
+		/**
+		 * Low-level function, only use if you know what you’re doing. It accepts a string of text as input
+		 * and the language definitions to use, and returns a string with the HTML produced.
+		 *
+		 * The following hooks will be run:
+		 * 1. `before-tokenize`
+		 * 2. `after-tokenize`
+		 * 3. `wrap`: On each {@link Token}.
+		 *
+		 * @param {string} text A string with the code to be highlighted.
+		 * @param {Grammar} grammar An object containing the tokens to use.
+		 *
+		 * Usually a language definition like `Prism.languages.markup`.
+		 * @param {string} language The name of the language definition passed to `grammar`.
+		 * @returns {string} The highlighted HTML.
+		 * @memberof Prism
+		 * @public
+		 * @example
+		 * Prism.highlight('var foo = true;', Prism.languages.javascript, 'javascript');
+		 */
+		highlight: function (text, grammar, language) {
+			var env = {
+				code: text,
+				grammar: grammar,
+				language: language
+			};
+			_.hooks.run('before-tokenize', env);
+			env.tokens = _.tokenize(env.code, env.grammar);
+			_.hooks.run('after-tokenize', env);
+			return Token.stringify(_.util.encode(env.tokens), env.language);
+		},
 
-			_.hooks.run('before-insert', env);
+		/**
+		 * This is the heart of Prism, and the most low-level function you can use. It accepts a string of text as input
+		 * and the language definitions to use, and returns an array with the tokenized code.
+		 *
+		 * When the language definition includes nested tokens, the function is called recursively on each of these tokens.
+		 *
+		 * This method could be useful in other contexts as well, as a very crude parser.
+		 *
+		 * @param {string} text A string with the code to be highlighted.
+		 * @param {Grammar} grammar An object containing the tokens to use.
+		 *
+		 * Usually a language definition like `Prism.languages.markup`.
+		 * @returns {TokenStream} An array of strings and tokens, a token stream.
+		 * @memberof Prism
+		 * @public
+		 * @example
+		 * let code = `var foo = 0;`;
+		 * let tokens = Prism.tokenize(code, Prism.languages.javascript);
+		 * tokens.forEach(token => {
+		 *     if (token instanceof Prism.Token && token.type === 'number') {
+		 *         console.log(`Found numeric literal: ${token.content}`);
+		 *     }
+		 * });
+		 */
+		tokenize: function (text, grammar) {
+			var rest = grammar.rest;
+			if (rest) {
+				for (var token in rest) {
+					grammar[token] = rest[token];
+				}
 
-			env.element.innerHTML = env.highlightedCode;
+				delete grammar.rest;
+			}
 
-			_.hooks.run('after-highlight', env);
-			_.hooks.run('complete', env);
-			callback && callback.call(env.element);
-		}
+			var tokenList = new LinkedList();
+			addAfter(tokenList, tokenList.head, text);
 
-		_.hooks.run('before-sanity-check', env);
+			matchGrammar(text, tokenList, grammar, tokenList.head, 0);
 
-		if (!env.code) {
-			_.hooks.run('complete', env);
-			callback && callback.call(env.element);
-			return;
-		}
+			return toArray(tokenList);
+		},
 
-		_.hooks.run('before-highlight', env);
+		/**
+		 * @namespace
+		 * @memberof Prism
+		 * @public
+		 */
+		hooks: {
+			all: {},
 
-		if (!env.grammar) {
-			insertHighlightedCode(_.util.encode(env.code));
-			return;
-		}
+			/**
+			 * Adds the given callback to the list of callbacks for the given hook.
+			 *
+			 * The callback will be invoked when the hook it is registered for is run.
+			 * Hooks are usually directly run by a highlight function but you can also run hooks yourself.
+			 *
+			 * One callback function can be registered to multiple hooks and the same hook multiple times.
+			 *
+			 * @param {string} name The name of the hook.
+			 * @param {HookCallback} callback The callback function which is given environment variables.
+			 * @public
+			 */
+			add: function (name, callback) {
+				var hooks = _.hooks.all;
 
-		if (async && _self.Worker) {
-			var worker = new Worker(_.filename);
+				hooks[name] = hooks[name] || [];
 
-			worker.onmessage = function(evt) {
-				insertHighlightedCode(evt.data);
-			};
+				hooks[name].push(callback);
+			},
 
-			worker.postMessage(JSON.stringify({
-				language: env.language,
-				code: env.code,
-				immediateClose: true
-			}));
-		}
-		else {
-			insertHighlightedCode(_.highlight(env.code, env.grammar, env.language));
-		}
-	},
+			/**
+			 * Runs a hook invoking all registered callbacks with the given environment variables.
+			 *
+			 * Callbacks will be invoked synchronously and in the order in which they were registered.
+			 *
+			 * @param {string} name The name of the hook.
+			 * @param {Object<string, any>} env The environment variables of the hook passed to all callbacks registered.
+			 * @public
+			 */
+			run: function (name, env) {
+				var callbacks = _.hooks.all[name];
 
-	/**
-	 * Low-level function, only use if you know what you’re doing. It accepts a string of text as input
-	 * and the language definitions to use, and returns a string with the HTML produced.
-	 *
-	 * The following hooks will be run:
-	 * 1. `before-tokenize`
-	 * 2. `after-tokenize`
-	 * 3. `wrap`: On each {@link Token}.
-	 *
-	 * @param {string} text A string with the code to be highlighted.
-	 * @param {Grammar} grammar An object containing the tokens to use.
-	 *
-	 * Usually a language definition like `Prism.languages.markup`.
-	 * @param {string} language The name of the language definition passed to `grammar`.
-	 * @returns {string} The highlighted HTML.
-	 * @memberof Prism
-	 * @public
-	 * @example
-	 * Prism.highlight('var foo = true;', Prism.languages.javascript, 'javascript');
-	 */
-	highlight: function (text, grammar, language) {
-		var env = {
-			code: text,
-			grammar: grammar,
-			language: language
-		};
-		_.hooks.run('before-tokenize', env);
-		env.tokens = _.tokenize(env.code, env.grammar);
-		_.hooks.run('after-tokenize', env);
-		return Token.stringify(_.util.encode(env.tokens), env.language);
-	},
+				if (!callbacks || !callbacks.length) {
+					return;
+				}
 
-	/**
-	 * This is the heart of Prism, and the most low-level function you can use. It accepts a string of text as input
-	 * and the language definitions to use, and returns an array with the tokenized code.
-	 *
-	 * When the language definition includes nested tokens, the function is called recursively on each of these tokens.
-	 *
-	 * This method could be useful in other contexts as well, as a very crude parser.
-	 *
-	 * @param {string} text A string with the code to be highlighted.
-	 * @param {Grammar} grammar An object containing the tokens to use.
-	 *
-	 * Usually a language definition like `Prism.languages.markup`.
-	 * @returns {TokenStream} An array of strings and tokens, a token stream.
-	 * @memberof Prism
-	 * @public
-	 * @example
-	 * let code = `var foo = 0;`;
-	 * let tokens = Prism.tokenize(code, Prism.languages.javascript);
-	 * tokens.forEach(token => {
-	 *     if (token instanceof Prism.Token && token.type === 'number') {
-	 *         console.log(`Found numeric literal: ${token.content}`);
-	 *     }
-	 * });
-	 */
-	tokenize: function(text, grammar) {
-		var rest = grammar.rest;
-		if (rest) {
-			for (var token in rest) {
-				grammar[token] = rest[token];
+				for (var i = 0, callback; (callback = callbacks[i++]);) {
+					callback(env);
+				}
 			}
+		},
 
-			delete grammar.rest;
-		}
-
-		var tokenList = new LinkedList();
-		addAfter(tokenList, tokenList.head, text);
+		Token: Token
+	};
+	_self.Prism = _;
 
-		matchGrammar(text, tokenList, grammar, tokenList.head, 0);
 
-		return toArray(tokenList);
-	},
+	// Typescript note:
+	// The following can be used to import the Token type in JSDoc:
+	//
+	//   @typedef {InstanceType<import("./prism-core")["Token"]>} Token
 
 	/**
-	 * @namespace
-	 * @memberof Prism
+	 * Creates a new token.
+	 *
+	 * @param {string} type See {@link Token#type type}
+	 * @param {string | TokenStream} content See {@link Token#content content}
+	 * @param {string|string[]} [alias] The alias(es) of the token.
+	 * @param {string} [matchedStr=""] A copy of the full string this token was created from.
+	 * @class
+	 * @global
 	 * @public
 	 */
-	hooks: {
-		all: {},
-
+	function Token(type, content, alias, matchedStr) {
 		/**
-		 * Adds the given callback to the list of callbacks for the given hook.
+		 * The type of the token.
 		 *
-		 * The callback will be invoked when the hook it is registered for is run.
-		 * Hooks are usually directly run by a highlight function but you can also run hooks yourself.
+		 * This is usually the key of a pattern in a {@link Grammar}.
 		 *
-		 * One callback function can be registered to multiple hooks and the same hook multiple times.
-		 *
-		 * @param {string} name The name of the hook.
-		 * @param {HookCallback} callback The callback function which is given environment variables.
+		 * @type {string}
+		 * @see GrammarToken
 		 * @public
 		 */
-		add: function (name, callback) {
-			var hooks = _.hooks.all;
-
-			hooks[name] = hooks[name] || [];
-
-			hooks[name].push(callback);
-		},
-
+		this.type = type;
 		/**
-		 * Runs a hook invoking all registered callbacks with the given environment variables.
+		 * The strings or tokens contained by this token.
 		 *
-		 * Callbacks will be invoked synchronously and in the order in which they were registered.
+		 * This will be a token stream if the pattern matched also defined an `inside` grammar.
 		 *
-		 * @param {string} name The name of the hook.
-		 * @param {Object<string, any>} env The environment variables of the hook passed to all callbacks registered.
+		 * @type {string | TokenStream}
 		 * @public
 		 */
-		run: function (name, env) {
-			var callbacks = _.hooks.all[name];
-
-			if (!callbacks || !callbacks.length) {
-				return;
-			}
-
-			for (var i=0, callback; callback = callbacks[i++];) {
-				callback(env);
-			}
-		}
-	},
-
-	Token: Token
-};
-_self.Prism = _;
-
-
-// Typescript note:
-// The following can be used to import the Token type in JSDoc:
-//
-//   @typedef {InstanceType<import("./prism-core")["Token"]>} Token
+		this.content = content;
+		/**
+		 * The alias(es) of the token.
+		 *
+		 * @type {string|string[]}
+		 * @see GrammarToken
+		 * @public
+		 */
+		this.alias = alias;
+		// Copy of the full string this token was created from
+		this.length = (matchedStr || '').length | 0;
+	}
 
-/**
- * Creates a new token.
- *
- * @param {string} type See {@link Token#type type}
- * @param {string | TokenStream} content See {@link Token#content content}
- * @param {string|string[]} [alias] The alias(es) of the token.
- * @param {string} [matchedStr=""] A copy of the full string this token was created from.
- * @class
- * @global
- * @public
- */
-function Token(type, content, alias, matchedStr) {
 	/**
-	 * The type of the token.
+	 * A token stream is an array of strings and {@link Token Token} objects.
 	 *
-	 * This is usually the key of a pattern in a {@link Grammar}.
+	 * Token streams have to fulfill a few properties that are assumed by most functions (mostly internal ones) that process
+	 * them.
 	 *
-	 * @type {string}
-	 * @see GrammarToken
-	 * @public
-	 */
-	this.type = type;
-	/**
-	 * The strings or tokens contained by this token.
+	 * 1. No adjacent strings.
+	 * 2. No empty strings.
 	 *
-	 * This will be a token stream if the pattern matched also defined an `inside` grammar.
+	 *    The only exception here is the token stream that only contains the empty string and nothing else.
 	 *
-	 * @type {string | TokenStream}
+	 * @typedef {Array<string | Token>} TokenStream
+	 * @global
 	 * @public
 	 */
-	this.content = content;
+
 	/**
-	 * The alias(es) of the token.
+	 * Converts the given token or token stream to an HTML representation.
 	 *
-	 * @type {string|string[]}
-	 * @see GrammarToken
-	 * @public
+	 * The following hooks will be run:
+	 * 1. `wrap`: On each {@link Token}.
+	 *
+	 * @param {string | Token | TokenStream} o The token or token stream to be converted.
+	 * @param {string} language The name of current language.
+	 * @returns {string} The HTML representation of the token or token stream.
+	 * @memberof Token
+	 * @static
 	 */
-	this.alias = alias;
-	// Copy of the full string this token was created from
-	this.length = (matchedStr || '').length | 0;
-}
-
-/**
- * A token stream is an array of strings and {@link Token Token} objects.
- *
- * Token streams have to fulfill a few properties that are assumed by most functions (mostly internal ones) that process
- * them.
- *
- * 1. No adjacent strings.
- * 2. No empty strings.
- *
- *    The only exception here is the token stream that only contains the empty string and nothing else.
- *
- * @typedef {Array<string | Token>} TokenStream
- * @global
- * @public
- */
-
-/**
- * Converts the given token or token stream to an HTML representation.
- *
- * The following hooks will be run:
- * 1. `wrap`: On each {@link Token}.
- *
- * @param {string | Token | TokenStream} o The token or token stream to be converted.
- * @param {string} language The name of current language.
- * @returns {string} The HTML representation of the token or token stream.
- * @memberof Token
- * @static
- */
-Token.stringify = function stringify(o, language) {
-	if (typeof o == 'string') {
-		return o;
-	}
-	if (Array.isArray(o)) {
-		var s = '';
-		o.forEach(function (e) {
-			s += stringify(e, language);
-		});
-		return s;
-	}
-
-	var env = {
-		type: o.type,
-		content: stringify(o.content, language),
-		tag: 'span',
-		classes: ['token', o.type],
-		attributes: {},
-		language: language
-	};
-
-	var aliases = o.alias;
-	if (aliases) {
-		if (Array.isArray(aliases)) {
-			Array.prototype.push.apply(env.classes, aliases);
-		} else {
-			env.classes.push(aliases);
+	Token.stringify = function stringify(o, language) {
+		if (typeof o == 'string') {
+			return o;
+		}
+		if (Array.isArray(o)) {
+			var s = '';
+			o.forEach(function (e) {
+				s += stringify(e, language);
+			});
+			return s;
 		}
-	}
 
-	_.hooks.run('wrap', env);
+		var env = {
+			type: o.type,
+			content: stringify(o.content, language),
+			tag: 'span',
+			classes: ['token', o.type],
+			attributes: {},
+			language: language
+		};
 
-	var attributes = '';
-	for (var name in env.attributes) {
-		attributes += ' ' + name + '="' + (env.attributes[name] || '').replace(/"/g, '&quot;') + '"';
-	}
+		var aliases = o.alias;
+		if (aliases) {
+			if (Array.isArray(aliases)) {
+				Array.prototype.push.apply(env.classes, aliases);
+			} else {
+				env.classes.push(aliases);
+			}
+		}
 
-	return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + attributes + '>' + env.content + '</' + env.tag + '>';
-};
+		_.hooks.run('wrap', env);
 
-/**
- * @param {RegExp} pattern
- * @param {number} pos
- * @param {string} text
- * @param {boolean} lookbehind
- * @returns {RegExpExecArray | null}
- */
-function matchPattern(pattern, pos, text, lookbehind) {
-	pattern.lastIndex = pos;
-	var match = pattern.exec(text);
-	if (match && lookbehind && match[1]) {
-		// change the match to remove the text matched by the Prism lookbehind group
-		var lookbehindLength = match[1].length;
-		match.index += lookbehindLength;
-		match[0] = match[0].slice(lookbehindLength);
-	}
-	return match;
-}
-
-/**
- * @param {string} text
- * @param {LinkedList<string | Token>} tokenList
- * @param {any} grammar
- * @param {LinkedListNode<string | Token>} startNode
- * @param {number} startPos
- * @param {RematchOptions} [rematch]
- * @returns {void}
- * @private
- *
- * @typedef RematchOptions
- * @property {string} cause
- * @property {number} reach
- */
-function matchGrammar(text, tokenList, grammar, startNode, startPos, rematch) {
-	for (var token in grammar) {
-		if (!grammar.hasOwnProperty(token) || !grammar[token]) {
-			continue;
+		var attributes = '';
+		for (var name in env.attributes) {
+			attributes += ' ' + name + '="' + (env.attributes[name] || '').replace(/"/g, '&quot;') + '"';
 		}
 
-		var patterns = grammar[token];
-		patterns = Array.isArray(patterns) ? patterns : [patterns];
-
-		for (var j = 0; j < patterns.length; ++j) {
-			if (rematch && rematch.cause == token + ',' + j) {
-				return;
-			}
+		return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + attributes + '>' + env.content + '</' + env.tag + '>';
+	};
 
-			var patternObj = patterns[j],
-				inside = patternObj.inside,
-				lookbehind = !!patternObj.lookbehind,
-				greedy = !!patternObj.greedy,
-				alias = patternObj.alias;
+	/**
+	 * @param {RegExp} pattern
+	 * @param {number} pos
+	 * @param {string} text
+	 * @param {boolean} lookbehind
+	 * @returns {RegExpExecArray | null}
+	 */
+	function matchPattern(pattern, pos, text, lookbehind) {
+		pattern.lastIndex = pos;
+		var match = pattern.exec(text);
+		if (match && lookbehind && match[1]) {
+			// change the match to remove the text matched by the Prism lookbehind group
+			var lookbehindLength = match[1].length;
+			match.index += lookbehindLength;
+			match[0] = match[0].slice(lookbehindLength);
+		}
+		return match;
+	}
 
-			if (greedy && !patternObj.pattern.global) {
-				// Without the global flag, lastIndex won't work
-				var flags = patternObj.pattern.toString().match(/[imsuy]*$/)[0];
-				patternObj.pattern = RegExp(patternObj.pattern.source, flags + 'g');
+	/**
+	 * @param {string} text
+	 * @param {LinkedList<string | Token>} tokenList
+	 * @param {any} grammar
+	 * @param {LinkedListNode<string | Token>} startNode
+	 * @param {number} startPos
+	 * @param {RematchOptions} [rematch]
+	 * @returns {void}
+	 * @private
+	 *
+	 * @typedef RematchOptions
+	 * @property {string} cause
+	 * @property {number} reach
+	 */
+	function matchGrammar(text, tokenList, grammar, startNode, startPos, rematch) {
+		for (var token in grammar) {
+			if (!grammar.hasOwnProperty(token) || !grammar[token]) {
+				continue;
 			}
 
-			/** @type {RegExp} */
-			var pattern = patternObj.pattern || patternObj;
-
-			for ( // iterate the token list and keep track of the current token/string position
-				var currentNode = startNode.next, pos = startPos;
-				currentNode !== tokenList.tail;
-				pos += currentNode.value.length, currentNode = currentNode.next
-			) {
+			var patterns = grammar[token];
+			patterns = Array.isArray(patterns) ? patterns : [patterns];
 
-				if (rematch && pos >= rematch.reach) {
-					break;
+			for (var j = 0; j < patterns.length; ++j) {
+				if (rematch && rematch.cause == token + ',' + j) {
+					return;
 				}
 
-				var str = currentNode.value;
+				var patternObj = patterns[j];
+				var inside = patternObj.inside;
+				var lookbehind = !!patternObj.lookbehind;
+				var greedy = !!patternObj.greedy;
+				var alias = patternObj.alias;
 
-				if (tokenList.length > text.length) {
-					// Something went terribly wrong, ABORT, ABORT!
-					return;
+				if (greedy && !patternObj.pattern.global) {
+					// Without the global flag, lastIndex won't work
+					var flags = patternObj.pattern.toString().match(/[imsuy]*$/)[0];
+					patternObj.pattern = RegExp(patternObj.pattern.source, flags + 'g');
 				}
 
-				if (str instanceof Token) {
-					continue;
-				}
+				/** @type {RegExp} */
+				var pattern = patternObj.pattern || patternObj;
 
-				var removeCount = 1; // this is the to parameter of removeBetween
-				var match;
+				for ( // iterate the token list and keep track of the current token/string position
+					var currentNode = startNode.next, pos = startPos;
+					currentNode !== tokenList.tail;
+					pos += currentNode.value.length, currentNode = currentNode.next
+				) {
 
-				if (greedy) {
-					match = matchPattern(pattern, pos, text, lookbehind);
-					if (!match) {
+					if (rematch && pos >= rematch.reach) {
 						break;
 					}
 
-					var from = match.index;
-					var to = match.index + match[0].length;
-					var p = pos;
+					var str = currentNode.value;
 
-					// find the node that contains the match
-					p += currentNode.value.length;
-					while (from >= p) {
-						currentNode = currentNode.next;
-						p += currentNode.value.length;
+					if (tokenList.length > text.length) {
+						// Something went terribly wrong, ABORT, ABORT!
+						return;
 					}
-					// adjust pos (and p)
-					p -= currentNode.value.length;
-					pos = p;
 
-					// the current node is a Token, then the match starts inside another Token, which is invalid
-					if (currentNode.value instanceof Token) {
+					if (str instanceof Token) {
 						continue;
 					}
 
-					// find the last node which is affected by this match
-					for (
-						var k = currentNode;
-						k !== tokenList.tail && (p < to || typeof k.value === 'string');
-						k = k.next
-					) {
-						removeCount++;
-						p += k.value.length;
-					}
-					removeCount--;
+					var removeCount = 1; // this is the to parameter of removeBetween
+					var match;
 
-					// replace with the new match
-					str = text.slice(pos, p);
-					match.index -= pos;
-				} else {
-					match = matchPattern(pattern, 0, str, lookbehind);
-					if (!match) {
-						continue;
+					if (greedy) {
+						match = matchPattern(pattern, pos, text, lookbehind);
+						if (!match) {
+							break;
+						}
+
+						var from = match.index;
+						var to = match.index + match[0].length;
+						var p = pos;
+
+						// find the node that contains the match
+						p += currentNode.value.length;
+						while (from >= p) {
+							currentNode = currentNode.next;
+							p += currentNode.value.length;
+						}
+						// adjust pos (and p)
+						p -= currentNode.value.length;
+						pos = p;
+
+						// the current node is a Token, then the match starts inside another Token, which is invalid
+						if (currentNode.value instanceof Token) {
+							continue;
+						}
+
+						// find the last node which is affected by this match
+						for (
+							var k = currentNode;
+							k !== tokenList.tail && (p < to || typeof k.value === 'string');
+							k = k.next
+						) {
+							removeCount++;
+							p += k.value.length;
+						}
+						removeCount--;
+
+						// replace with the new match
+						str = text.slice(pos, p);
+						match.index -= pos;
+					} else {
+						match = matchPattern(pattern, 0, str, lookbehind);
+						if (!match) {
+							continue;
+						}
 					}
-				}
 
-				var from = match.index,
-					matchStr = match[0],
-					before = str.slice(0, from),
-					after = str.slice(from + matchStr.length);
+					// eslint-disable-next-line no-redeclare
+					var from = match.index;
+					var matchStr = match[0];
+					var before = str.slice(0, from);
+					var after = str.slice(from + matchStr.length);
 
-				var reach = pos + str.length;
-				if (rematch && reach > rematch.reach) {
-					rematch.reach = reach;
-				}
+					var reach = pos + str.length;
+					if (rematch && reach > rematch.reach) {
+						rematch.reach = reach;
+					}
 
-				var removeFrom = currentNode.prev;
+					var removeFrom = currentNode.prev;
 
-				if (before) {
-					removeFrom = addAfter(tokenList, removeFrom, before);
-					pos += before.length;
-				}
+					if (before) {
+						removeFrom = addAfter(tokenList, removeFrom, before);
+						pos += before.length;
+					}
 
-				removeRange(tokenList, removeFrom, removeCount);
+					removeRange(tokenList, removeFrom, removeCount);
 
-				var wrapped = new Token(token, inside ? _.tokenize(matchStr, inside) : matchStr, alias, matchStr);
-				currentNode = addAfter(tokenList, removeFrom, wrapped);
+					var wrapped = new Token(token, inside ? _.tokenize(matchStr, inside) : matchStr, alias, matchStr);
+					currentNode = addAfter(tokenList, removeFrom, wrapped);
 
-				if (after) {
-					addAfter(tokenList, currentNode, after);
-				}
+					if (after) {
+						addAfter(tokenList, currentNode, after);
+					}
 
-				if (removeCount > 1) {
-					// at least one Token object was removed, so we have to do some rematching
-					// this can only happen if the current pattern is greedy
+					if (removeCount > 1) {
+						// at least one Token object was removed, so we have to do some rematching
+						// this can only happen if the current pattern is greedy
 
-					/** @type {RematchOptions} */
-					var nestedRematch = {
-						cause: token + ',' + j,
-						reach: reach
-					};
-					matchGrammar(text, tokenList, grammar, currentNode.prev, pos, nestedRematch);
+						/** @type {RematchOptions} */
+						var nestedRematch = {
+							cause: token + ',' + j,
+							reach: reach
+						};
+						matchGrammar(text, tokenList, grammar, currentNode.prev, pos, nestedRematch);
 
-					// the reach might have been extended because of the rematching
-					if (rematch && nestedRematch.reach > rematch.reach) {
-						rematch.reach = nestedRematch.reach;
+						// the reach might have been extended because of the rematching
+						if (rematch && nestedRematch.reach > rematch.reach) {
+							rematch.reach = nestedRematch.reach;
+						}
 					}
 				}
 			}
 		}
 	}
-}
 
-/**
- * @typedef LinkedListNode
- * @property {T} value
- * @property {LinkedListNode<T> | null} prev The previous node.
- * @property {LinkedListNode<T> | null} next The next node.
- * @template T
- * @private
- */
+	/**
+	 * @typedef LinkedListNode
+	 * @property {T} value
+	 * @property {LinkedListNode<T> | null} prev The previous node.
+	 * @property {LinkedListNode<T> | null} next The next node.
+	 * @template T
+	 * @private
+	 */
 
-/**
- * @template T
- * @private
- */
-function LinkedList() {
-	/** @type {LinkedListNode<T>} */
-	var head = { value: null, prev: null, next: null };
-	/** @type {LinkedListNode<T>} */
-	var tail = { value: null, prev: head, next: null };
-	head.next = tail;
-
-	/** @type {LinkedListNode<T>} */
-	this.head = head;
-	/** @type {LinkedListNode<T>} */
-	this.tail = tail;
-	this.length = 0;
-}
+	/**
+	 * @template T
+	 * @private
+	 */
+	function LinkedList() {
+		/** @type {LinkedListNode<T>} */
+		var head = { value: null, prev: null, next: null };
+		/** @type {LinkedListNode<T>} */
+		var tail = { value: null, prev: head, next: null };
+		head.next = tail;
+
+		/** @type {LinkedListNode<T>} */
+		this.head = head;
+		/** @type {LinkedListNode<T>} */
+		this.tail = tail;
+		this.length = 0;
+	}
 
-/**
- * Adds a new node with the given value to the list.
- * @param {LinkedList<T>} list
- * @param {LinkedListNode<T>} node
- * @param {T} value
- * @returns {LinkedListNode<T>} The added node.
- * @template T
- */
-function addAfter(list, node, value) {
-	// assumes that node != list.tail && values.length >= 0
-	var next = node.next;
+	/**
+	 * Adds a new node with the given value to the list.
+	 *
+	 * @param {LinkedList<T>} list
+	 * @param {LinkedListNode<T>} node
+	 * @param {T} value
+	 * @returns {LinkedListNode<T>} The added node.
+	 * @template T
+	 */
+	function addAfter(list, node, value) {
+		// assumes that node != list.tail && values.length >= 0
+		var next = node.next;
 
-	var newNode = { value: value, prev: node, next: next };
-	node.next = newNode;
-	next.prev = newNode;
-	list.length++;
+		var newNode = { value: value, prev: node, next: next };
+		node.next = newNode;
+		next.prev = newNode;
+		list.length++;
 
-	return newNode;
-}
-/**
- * Removes `count` nodes after the given node. The given node will not be removed.
- * @param {LinkedList<T>} list
- * @param {LinkedListNode<T>} node
- * @param {number} count
- * @template T
- */
-function removeRange(list, node, count) {
-	var next = node.next;
-	for (var i = 0; i < count && next !== list.tail; i++) {
-		next = next.next;
+		return newNode;
 	}
-	node.next = next;
-	next.prev = node;
-	list.length -= i;
-}
-/**
- * @param {LinkedList<T>} list
- * @returns {T[]}
- * @template T
- */
-function toArray(list) {
-	var array = [];
-	var node = list.head.next;
-	while (node !== list.tail) {
-		array.push(node.value);
-		node = node.next;
+	/**
+	 * Removes `count` nodes after the given node. The given node will not be removed.
+	 *
+	 * @param {LinkedList<T>} list
+	 * @param {LinkedListNode<T>} node
+	 * @param {number} count
+	 * @template T
+	 */
+	function removeRange(list, node, count) {
+		var next = node.next;
+		for (var i = 0; i < count && next !== list.tail; i++) {
+			next = next.next;
+		}
+		node.next = next;
+		next.prev = node;
+		list.length -= i;
+	}
+	/**
+	 * @param {LinkedList<T>} list
+	 * @returns {T[]}
+	 * @template T
+	 */
+	function toArray(list) {
+		var array = [];
+		var node = list.head.next;
+		while (node !== list.tail) {
+			array.push(node.value);
+			node = node.next;
+		}
+		return array;
 	}
-	return array;
-}
 
 
-if (!_self.document) {
-	if (!_self.addEventListener) {
-		// in Node.js
-		return _;
-	}
+	if (!_self.document) {
+		if (!_self.addEventListener) {
+			// in Node.js
+			return _;
+		}
 
-	if (!_.disableWorkerMessageHandler) {
-		// In worker
-		_self.addEventListener('message', function (evt) {
-			var message = JSON.parse(evt.data),
-				lang = message.language,
-				code = message.code,
-				immediateClose = message.immediateClose;
-
-			_self.postMessage(_.highlight(code, _.languages[lang], lang));
-			if (immediateClose) {
-				_self.close();
-			}
-		}, false);
-	}
+		if (!_.disableWorkerMessageHandler) {
+			// In worker
+			_self.addEventListener('message', function (evt) {
+				var message = JSON.parse(evt.data);
+				var lang = message.language;
+				var code = message.code;
+				var immediateClose = message.immediateClose;
+
+				_self.postMessage(_.highlight(code, _.languages[lang], lang));
+				if (immediateClose) {
+					_self.close();
+				}
+			}, false);
+		}
 
-	return _;
-}
+		return _;
+	}
 
-// Get current script and highlight
-var script = _.util.currentScript();
+	// Get current script and highlight
+	var script = _.util.currentScript();
 
-if (script) {
-	_.filename = script.src;
+	if (script) {
+		_.filename = script.src;
 
-	if (script.hasAttribute('data-manual')) {
-		_.manual = true;
+		if (script.hasAttribute('data-manual')) {
+			_.manual = true;
+		}
 	}
-}
 
-function highlightAutomaticallyCallback() {
-	if (!_.manual) {
-		_.highlightAll();
+	function highlightAutomaticallyCallback() {
+		if (!_.manual) {
+			_.highlightAll();
+		}
 	}
-}
 
-if (!_.manual) {
-	// If the document state is "loading", then we'll use DOMContentLoaded.
-	// If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
-	// DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
-	// might take longer one animation frame to execute which can create a race condition where only some plugins have
-	// been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
-	// See https://github.com/PrismJS/prism/issues/2102
-	var readyState = document.readyState;
-	if (readyState === 'loading' || readyState === 'interactive' && script && script.defer) {
-		document.addEventListener('DOMContentLoaded', highlightAutomaticallyCallback);
-	} else {
-		if (window.requestAnimationFrame) {
-			window.requestAnimationFrame(highlightAutomaticallyCallback);
+	if (!_.manual) {
+		// If the document state is "loading", then we'll use DOMContentLoaded.
+		// If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
+		// DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
+		// might take longer one animation frame to execute which can create a race condition where only some plugins have
+		// been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
+		// See https://github.com/PrismJS/prism/issues/2102
+		var readyState = document.readyState;
+		if (readyState === 'loading' || readyState === 'interactive' && script && script.defer) {
+			document.addEventListener('DOMContentLoaded', highlightAutomaticallyCallback);
 		} else {
-			window.setTimeout(highlightAutomaticallyCallback, 16);
+			if (window.requestAnimationFrame) {
+				window.requestAnimationFrame(highlightAutomaticallyCallback);
+			} else {
+				window.setTimeout(highlightAutomaticallyCallback, 16);
+			}
 		}
 	}
-}
 
-return _;
+	return _;
 
-})(_self);
+}(_self));
 
 if (typeof module !== 'undefined' && module.exports) {
 	module.exports = Prism;
@@ -1176,7 +1194,7 @@ if (typeof global !== 'undefined') {
  * each another.
  * @global
  * @public
-*/
+ */
 
 /**
  * @typedef Grammar
@@ -1194,7 +1212,7 @@ if (typeof global !== 'undefined') {
  * @returns {void}
  * @global
  * @public
-*/
+ */
 
 /**
  * @callback HookCallback
@@ -1239,6 +1257,7 @@ Prism.languages.markup = {
 					'namespace': /^[^\s>\/:]+:/
 				}
 			},
+			'special-attr': [],
 			'attr-value': {
 				pattern: /=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/,
 				inside: {
@@ -1325,6 +1344,49 @@ Object.defineProperty(Prism.languages.markup.tag, 'addInlined', {
 		Prism.languages.insertBefore('markup', 'cdata', def);
 	}
 });
+Object.defineProperty(Prism.languages.markup.tag, 'addAttribute', {
+	/**
+	 * Adds an pattern to highlight languages embedded in HTML attributes.
+	 *
+	 * An example of an inlined language is CSS with `style` attributes.
+	 *
+	 * @param {string} attrName The name of the tag that contains the inlined language. This name will be treated as
+	 * case insensitive.
+	 * @param {string} lang The language key.
+	 * @example
+	 * addAttribute('style', 'css');
+	 */
+	value: function (attrName, lang) {
+		Prism.languages.markup.tag.inside['special-attr'].push({
+			pattern: RegExp(
+				/(^|["'\s])/.source + '(?:' + attrName + ')' + /\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))/.source,
+				'i'
+			),
+			lookbehind: true,
+			inside: {
+				'attr-name': /^[^\s=]+/,
+				'attr-value': {
+					pattern: /=[\s\S]+/,
+					inside: {
+						'value': {
+							pattern: /(=\s*(["']|(?!["'])))\S[\s\S]*(?=\2$)/,
+							lookbehind: true,
+							alias: [lang, 'language-' + lang],
+							inside: Prism.languages[lang]
+						},
+						'punctuation': [
+							{
+								pattern: /^=/,
+								alias: 'attr-equals'
+							},
+							/"|'/
+						]
+					}
+				}
+			}
+		});
+	}
+});
 
 Prism.languages.html = Prism.languages.markup;
 Prism.languages.mathml = Prism.languages.markup;
@@ -1386,34 +1448,7 @@ Prism.languages.rss = Prism.languages.xml;
 	var markup = Prism.languages.markup;
 	if (markup) {
 		markup.tag.addInlined('style', 'css');
-
-		Prism.languages.insertBefore('inside', 'attr-value', {
-			'style-attr': {
-				pattern: /(^|["'\s])style\s*=\s*(?:"[^"]*"|'[^']*')/i,
-				lookbehind: true,
-				inside: {
-					'attr-value': {
-						pattern: /=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/,
-						inside: {
-							'style': {
-								pattern: /(["'])[\s\S]+(?=["']$)/,
-								lookbehind: true,
-								alias: 'language-css',
-								inside: Prism.languages.css
-							},
-							'punctuation': [
-								{
-									pattern: /^=/,
-									alias: 'attr-equals'
-								},
-								/"|'/
-							]
-						}
-					},
-					'attr-name': /^style/i
-				}
-			}
-		}, markup.tag);
+		markup.tag.addAttribute('style', 'css');
 	}
 
 }(Prism));
@@ -1464,7 +1499,7 @@ Prism.languages.javascript = Prism.languages.extend('clike', {
 			lookbehind: true
 		},
 		{
-			pattern: /(^|[^.]|\.\.\.\s*)\b(?:as|async(?=\s*(?:function\b|\(|[$\w\xA0-\uFFFF]|$))|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally(?=\s*(?:\{|$))|for|from(?=\s*(?:['"]|$))|function|(?:get|set)(?=\s*(?:[\[$\w\xA0-\uFFFF]|$))|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/,
+			pattern: /(^|[^.]|\.\.\.\s*)\b(?:as|async(?=\s*(?:function\b|\(|[$\w\xA0-\uFFFF]|$))|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally(?=\s*(?:\{|$))|for|from(?=\s*(?:['"]|$))|function|(?:get|set)(?=\s*(?:[#\[$\w\xA0-\uFFFF]|$))|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/,
 			lookbehind: true
 		},
 	],
@@ -1478,7 +1513,7 @@ Prism.languages.javascript['class-name'][0].pattern = /(\b(?:class|interface|ext
 
 Prism.languages.insertBefore('javascript', 'keyword', {
 	'regex': {
-		pattern: /((?:^|[^$\w\xA0-\uFFFF."'\])\s]|\b(?:return|yield))\s*)\/(?:\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=(?:\s|\/\*(?:[^*]|\*(?!\/))*\*\/)*(?:$|[\r\n,.;:})\]]|\/\/))/,
+		pattern: /((?:^|[^$\w\xA0-\uFFFF."'\])\s]|\b(?:return|yield))\s*)\/(?:\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[dgimyus]{0,7}(?=(?:\s|\/\*(?:[^*]|\*(?!\/))*\*\/)*(?:$|[\r\n,.;:})\]]|\/\/))/,
 		lookbehind: true,
 		greedy: true,
 		inside: {
@@ -1522,6 +1557,11 @@ Prism.languages.insertBefore('javascript', 'keyword', {
 });
 
 Prism.languages.insertBefore('javascript', 'string', {
+	'hashbang': {
+		pattern: /^#!.*/,
+		greedy: true,
+		alias: 'comment'
+	},
 	'template-string': {
 		pattern: /`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/,
 		greedy: true,
@@ -1548,11 +1588,18 @@ Prism.languages.insertBefore('javascript', 'string', {
 
 if (Prism.languages.markup) {
 	Prism.languages.markup.tag.addInlined('script', 'javascript');
+
+	// add attribute support for all DOM events.
+	// https://developer.mozilla.org/en-US/docs/Web/Events#Standard_events
+	Prism.languages.markup.tag.addAttribute(
+		/on(?:abort|blur|change|click|composition(?:end|start|update)|dblclick|error|focus(?:in|out)?|key(?:down|up)|load|mouse(?:down|enter|leave|move|out|over|up)|reset|resize|scroll|select|slotchange|submit|unload|wheel)/.source,
+		'javascript'
+	);
 }
 
 Prism.languages.js = Prism.languages.javascript;
 
-(function(Prism) {
+(function (Prism) {
 	// $ set | grep '^[A-Z][^[:space:]]*=' | cut -d= -f1 | tr '\n' '|'
 	// + LC_ALL, RANDOM, REPLY, SECONDS.
 	// + make sure PS1..4 are here as they are not always set,
@@ -1569,7 +1616,7 @@ Prism.languages.js = Prism.languages.javascript;
 	var insideString = {
 		'bash': commandAfterHeredoc,
 		'environment': {
-			pattern: RegExp("\\$" + envVars),
+			pattern: RegExp('\\$' + envVars),
 			alias: 'constant'
 		},
 		'variable': [
@@ -1609,7 +1656,7 @@ Prism.languages.js = Prism.languages.javascript;
 					'operator': /:[-=?+]?|[!\/]|##?|%%?|\^\^?|,,?/,
 					'punctuation': /[\[\]]/,
 					'environment': {
-						pattern: RegExp("(\\{)" + envVars),
+						pattern: RegExp('(\\{)' + envVars),
 						lookbehind: true,
 						alias: 'constant'
 					}
@@ -1637,13 +1684,13 @@ Prism.languages.js = Prism.languages.javascript;
 			// but not “foo {”
 			{
 				// a) and c)
-				pattern: /(\bfunction\s+)\w+(?=(?:\s*\(?:\s*\))?\s*\{)/,
+				pattern: /(\bfunction\s+)[\w-]+(?=(?:\s*\(?:\s*\))?\s*\{)/,
 				lookbehind: true,
 				alias: 'function'
 			},
 			{
 				// b)
-				pattern: /\b\w+(?=\s*\(\s*\)\s*\{)/,
+				pattern: /\b[\w-]+(?=\s*\(\s*\)\s*\{)/,
 				alias: 'function'
 			}
 		],
@@ -1659,7 +1706,7 @@ Prism.languages.js = Prism.languages.javascript;
 			pattern: /(^|[\s;|&]|[<>]\()\w+(?=\+?=)/,
 			inside: {
 				'environment': {
-					pattern: RegExp("(^|[\\s;|&]|[<>]\\()" + envVars),
+					pattern: RegExp('(^|[\\s;|&]|[<>]\\()' + envVars),
 					lookbehind: true,
 					alias: 'constant'
 				}
@@ -1687,14 +1734,29 @@ Prism.languages.js = Prism.languages.javascript;
 			},
 			// “Normal” string
 			{
-				pattern: /(^|[^\\](?:\\\\)*)(["'])(?:\\[\s\S]|\$\([^)]+\)|\$(?!\()|`[^`]+`|(?!\2)[^\\`$])*\2/,
+				// https://www.gnu.org/software/bash/manual/html_node/Double-Quotes.html
+				pattern: /(^|[^\\](?:\\\\)*)"(?:\\[\s\S]|\$\([^)]+\)|\$(?!\()|`[^`]+`|[^"\\`$])*"/,
 				lookbehind: true,
 				greedy: true,
 				inside: insideString
+			},
+			{
+				// https://www.gnu.org/software/bash/manual/html_node/Single-Quotes.html
+				pattern: /(^|[^$\\])'[^']*'/,
+				lookbehind: true,
+				greedy: true
+			},
+			{
+				// https://www.gnu.org/software/bash/manual/html_node/ANSI_002dC-Quoting.html
+				pattern: /\$'(?:[^'\\]|\\[\s\S])*'/,
+				greedy: true,
+				inside: {
+					'entity': insideString.entity
+				}
 			}
 		],
 		'environment': {
-			pattern: RegExp("\\$?" + envVars),
+			pattern: RegExp('\\$?' + envVars),
 			alias: 'constant'
 		},
 		'variable': insideString.variable,
@@ -1758,12 +1820,12 @@ Prism.languages.js = Prism.languages.javascript;
 		'number'
 	];
 	var inside = insideString.variable[1].inside;
-	for(var i = 0; i < toBeCopied.length; i++) {
+	for (var i = 0; i < toBeCopied.length; i++) {
 		inside[toBeCopied[i]] = Prism.languages.bash[toBeCopied[i]];
 	}
 
 	Prism.languages.shell = Prism.languages.bash;
-})(Prism);
+}(Prism));
 
 Prism.languages.c = Prism.languages.extend('clike', {
 	'comment': {
@@ -1831,7 +1893,8 @@ delete Prism.languages.c['boolean'];
 
 (function (Prism) {
 
-	var keyword = /\b(?:alignas|alignof|asm|auto|bool|break|case|catch|char|char8_t|char16_t|char32_t|class|compl|concept|const|consteval|constexpr|constinit|const_cast|continue|co_await|co_return|co_yield|decltype|default|delete|do|double|dynamic_cast|else|enum|explicit|export|extern|float|for|friend|goto|if|inline|int|int8_t|int16_t|int32_t|int64_t|uint8_t|uint16_t|uint32_t|uint64_t|long|mutable|namespace|new|noexcept|nullptr|operator|private|protected|public|register|reinterpret_cast|requires|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/;
+	var keyword = /\b(?:alignas|alignof|asm|auto|bool|break|case|catch|char|char8_t|char16_t|char32_t|class|compl|concept|const|consteval|constexpr|constinit|const_cast|continue|co_await|co_return|co_yield|decltype|default|delete|do|double|dynamic_cast|else|enum|explicit|export|extern|final|float|for|friend|goto|if|import|inline|int|int8_t|int16_t|int32_t|int64_t|uint8_t|uint16_t|uint32_t|uint64_t|long|module|mutable|namespace|new|noexcept|nullptr|operator|override|private|protected|public|register|reinterpret_cast|requires|return|short|signed|sizeof|static|static_assert|static_cast|struct|switch|template|this|thread_local|throw|try|typedef|typeid|typename|union|unsigned|using|virtual|void|volatile|wchar_t|while)\b/;
+	var modName = /\b(?!<keyword>)\w+(?:\s*\.\s*\w+)*\b/.source.replace(/<keyword>/g, function () { return keyword.source; });
 
 	Prism.languages.cpp = Prism.languages.extend('c', {
 		'class-name': [
@@ -1857,11 +1920,31 @@ delete Prism.languages.c['boolean'];
 			pattern: /(?:\b0b[01']+|\b0x(?:[\da-f']+(?:\.[\da-f']*)?|\.[\da-f']+)(?:p[+-]?[\d']+)?|(?:\b[\d']+(?:\.[\d']*)?|\B\.[\d']+)(?:e[+-]?[\d']+)?)[ful]{0,4}/i,
 			greedy: true
 		},
-		'operator': />>=?|<<=?|->|([-+&|:])\1|[?:~]|<=>|[-+*/%&|^!=<>]=?|\b(?:and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/,
+		'operator': />>=?|<<=?|->|--|\+\+|&&|\|\||[?:~]|<=>|[-+*/%&|^!=<>]=?|\b(?:and|and_eq|bitand|bitor|not|not_eq|or|or_eq|xor|xor_eq)\b/,
 		'boolean': /\b(?:true|false)\b/
 	});
 
 	Prism.languages.insertBefore('cpp', 'string', {
+		'module': {
+			// https://en.cppreference.com/w/cpp/language/modules
+			pattern: RegExp(
+				/(\b(?:module|import)\s+)/.source +
+				'(?:' +
+				// header-name
+				/"(?:\\(?:\r\n|[\s\S])|[^"\\\r\n])*"|<[^<>\r\n]*>/.source +
+				'|' +
+				// module name or partition or both
+				/<mod-name>(?:\s*:\s*<mod-name>)?|:\s*<mod-name>/.source.replace(/<mod-name>/g, function () { return modName; }) +
+				')'
+			),
+			lookbehind: true,
+			greedy: true,
+			inside: {
+				'string': /^[<"][\s\S]+/,
+				'operator': /:/,
+				'punctuation': /\./
+			}
+		},
 		'raw-string': {
 			pattern: /R"([^()\\ ]{0,16})\([\s\S]*?\)\1"/,
 			alias: 'string',
@@ -1869,6 +1952,27 @@ delete Prism.languages.c['boolean'];
 		}
 	});
 
+	Prism.languages.insertBefore('cpp', 'keyword', {
+		'generic-function': {
+			pattern: /\b[a-z_]\w*\s*<(?:[^<>]|<(?:[^<>])*>)*>(?=\s*\()/i,
+			inside: {
+				'function': /^\w+/,
+				'generic': {
+					pattern: /<[\s\S]+/,
+					alias: 'class-name',
+					inside: Prism.languages.cpp
+				}
+			}
+		}
+	});
+
+	Prism.languages.insertBefore('cpp', 'operator', {
+		'double-colon': {
+			pattern: /::/,
+			alias: 'punctuation'
+		}
+	});
+
 	Prism.languages.insertBefore('cpp', 'class-name', {
 		// the base clause is an optional list of parent classes
 		// https://en.cppreference.com/w/cpp/language/class
@@ -1879,108 +1983,109 @@ delete Prism.languages.c['boolean'];
 			inside: Prism.languages.extend('cpp', {})
 		}
 	});
-	Prism.languages.insertBefore('inside', 'operator', {
+
+	Prism.languages.insertBefore('inside', 'double-colon', {
 		// All untokenized words that are not namespaces should be class names
 		'class-name': /\b[a-z_]\w*\b(?!\s*::)/i
 	}, Prism.languages.cpp['base-clause']);
 
 }(Prism));
 
-(function(Prism) {
-
-// Ignore comments starting with { to privilege string interpolation highlighting
-var comment = /#(?!\{).+/,
-    interpolation = {
-    	pattern: /#\{[^}]+\}/,
-    	alias: 'variable'
-    };
+(function (Prism) {
 
-Prism.languages.coffeescript = Prism.languages.extend('javascript', {
-	'comment': comment,
-	'string': [
+	// Ignore comments starting with { to privilege string interpolation highlighting
+	var comment = /#(?!\{).+/;
+	var interpolation = {
+		pattern: /#\{[^}]+\}/,
+		alias: 'variable'
+	};
 
-		// Strings are multiline
-		{
-			pattern: /'(?:\\[\s\S]|[^\\'])*'/,
-			greedy: true
-		},
+	Prism.languages.coffeescript = Prism.languages.extend('javascript', {
+		'comment': comment,
+		'string': [
 
-		{
 			// Strings are multiline
-			pattern: /"(?:\\[\s\S]|[^\\"])*"/,
-			greedy: true,
-			inside: {
-				'interpolation': interpolation
+			{
+				pattern: /'(?:\\[\s\S]|[^\\'])*'/,
+				greedy: true
+			},
+
+			{
+				// Strings are multiline
+				pattern: /"(?:\\[\s\S]|[^\\"])*"/,
+				greedy: true,
+				inside: {
+					'interpolation': interpolation
+				}
 			}
+		],
+		'keyword': /\b(?:and|break|by|catch|class|continue|debugger|delete|do|each|else|extend|extends|false|finally|for|if|in|instanceof|is|isnt|let|loop|namespace|new|no|not|null|of|off|on|or|own|return|super|switch|then|this|throw|true|try|typeof|undefined|unless|until|when|while|window|with|yes|yield)\b/,
+		'class-member': {
+			pattern: /@(?!\d)\w+/,
+			alias: 'variable'
 		}
-	],
-	'keyword': /\b(?:and|break|by|catch|class|continue|debugger|delete|do|each|else|extend|extends|false|finally|for|if|in|instanceof|is|isnt|let|loop|namespace|new|no|not|null|of|off|on|or|own|return|super|switch|then|this|throw|true|try|typeof|undefined|unless|until|when|while|window|with|yes|yield)\b/,
-	'class-member': {
-		pattern: /@(?!\d)\w+/,
-		alias: 'variable'
-	}
-});
-
-Prism.languages.insertBefore('coffeescript', 'comment', {
-	'multiline-comment': {
-		pattern: /###[\s\S]+?###/,
-		alias: 'comment'
-	},
+	});
 
-	// Block regexp can contain comments and interpolation
-	'block-regex': {
-		pattern: /\/{3}[\s\S]*?\/{3}/,
-		alias: 'regex',
-		inside: {
-			'comment': comment,
-			'interpolation': interpolation
-		}
-	}
-});
+	Prism.languages.insertBefore('coffeescript', 'comment', {
+		'multiline-comment': {
+			pattern: /###[\s\S]+?###/,
+			alias: 'comment'
+		},
 
-Prism.languages.insertBefore('coffeescript', 'string', {
-	'inline-javascript': {
-		pattern: /`(?:\\[\s\S]|[^\\`])*`/,
-		inside: {
-			'delimiter': {
-				pattern: /^`|`$/,
-				alias: 'punctuation'
-			},
-			'script': {
-				pattern: /[\s\S]+/,
-				alias: 'language-javascript',
-				inside: Prism.languages.javascript
+		// Block regexp can contain comments and interpolation
+		'block-regex': {
+			pattern: /\/{3}[\s\S]*?\/{3}/,
+			alias: 'regex',
+			inside: {
+				'comment': comment,
+				'interpolation': interpolation
 			}
 		}
-	},
+	});
 
-	// Block strings
-	'multiline-string': [
-		{
-			pattern: /'''[\s\S]*?'''/,
-			greedy: true,
-			alias: 'string'
-		},
-		{
-			pattern: /"""[\s\S]*?"""/,
-			greedy: true,
-			alias: 'string',
+	Prism.languages.insertBefore('coffeescript', 'string', {
+		'inline-javascript': {
+			pattern: /`(?:\\[\s\S]|[^\\`])*`/,
 			inside: {
-				interpolation: interpolation
+				'delimiter': {
+					pattern: /^`|`$/,
+					alias: 'punctuation'
+				},
+				'script': {
+					pattern: /[\s\S]+/,
+					alias: 'language-javascript',
+					inside: Prism.languages.javascript
+				}
 			}
-		}
-	]
+		},
 
-});
+		// Block strings
+		'multiline-string': [
+			{
+				pattern: /'''[\s\S]*?'''/,
+				greedy: true,
+				alias: 'string'
+			},
+			{
+				pattern: /"""[\s\S]*?"""/,
+				greedy: true,
+				alias: 'string',
+				inside: {
+					interpolation: interpolation
+				}
+			}
+		]
 
-Prism.languages.insertBefore('coffeescript', 'keyword', {
-	// Object property
-	'property': /(?!\d)\w+(?=\s*:(?!:))/
-});
+	});
+
+	Prism.languages.insertBefore('coffeescript', 'keyword', {
+		// Object property
+		'property': /(?!\d)\w+(?=\s*:(?!:))/
+	});
 
-delete Prism.languages.coffeescript['template-string'];
+	delete Prism.languages.coffeescript['template-string'];
 
-Prism.languages.coffee = Prism.languages.coffeescript;
+	Prism.languages.coffee = Prism.languages.coffeescript;
 }(Prism));
 
 /**
@@ -2025,22 +2130,25 @@ Prism.languages.coffee = Prism.languages.coffeescript;
 		'regex': [
 			{
 				pattern: RegExp(/%r/.source + '(?:' + [
-					/([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1[gim]{0,3}/.source,
-					/\((?:[^()\\]|\\[\s\S])*\)[gim]{0,3}/.source,
+					/([^a-zA-Z0-9\s{(\[<])(?:(?!\1)[^\\]|\\[\s\S])*\1/.source,
+					/\((?:[^()\\]|\\[\s\S])*\)/.source,
 					// Here we need to specifically allow interpolation
-					/\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}[gim]{0,3}/.source,
-					/\[(?:[^\[\]\\]|\\[\s\S])*\][gim]{0,3}/.source,
-					/<(?:[^<>\\]|\\[\s\S])*>[gim]{0,3}/.source
-				].join('|') + ')'),
+					/\{(?:[^#{}\\]|#(?:\{[^}]+\})?|\\[\s\S])*\}/.source,
+					/\[(?:[^\[\]\\]|\\[\s\S])*\]/.source,
+					/<(?:[^<>\\]|\\[\s\S])*>/.source
+				].join('|') + ')' + /[egimnosux]{0,6}/.source),
 				greedy: true,
 				inside: {
 					'interpolation': interpolation
 				}
 			},
 			{
-				pattern: /(^|[^/])\/(?!\/)(?:\[[^\r\n\]]+\]|\\.|[^[/\\\r\n])+\/[gim]{0,3}(?=\s*(?:$|[\r\n,.;})]))/,
+				pattern: /(^|[^/])\/(?!\/)(?:\[[^\r\n\]]+\]|\\.|[^[/\\\r\n])+\/[egimnosux]{0,6}(?=\s*(?:$|[\r\n,.;})#]))/,
 				lookbehind: true,
-				greedy: true
+				greedy: true,
+				inside: {
+					'interpolation': interpolation
+				}
 			}
 		],
 		'variable': /[@$]+[a-zA-Z_]\w*(?:[?!]|\b)/,
@@ -2084,13 +2192,42 @@ Prism.languages.coffee = Prism.languages.coffeescript;
 			inside: {
 				'interpolation': interpolation
 			}
+		},
+		{
+			pattern: /<<[-~]?([a-z_]\w*)[\r\n](?:.*[\r\n])*?[\t ]*\1/i,
+			alias: 'heredoc-string',
+			greedy: true,
+			inside: {
+				'delimiter': {
+					pattern: /^<<[-~]?[a-z_]\w*|[a-z_]\w*$/i,
+					alias: 'symbol',
+					inside: {
+						'punctuation': /^<<[-~]?/
+					}
+				},
+				'interpolation': interpolation
+			}
+		},
+		{
+			pattern: /<<[-~]?'([a-z_]\w*)'[\r\n](?:.*[\r\n])*?[\t ]*\1/i,
+			alias: 'heredoc-string',
+			greedy: true,
+			inside: {
+				'delimiter': {
+					pattern: /^<<[-~]?'[a-z_]\w*'|[a-z_]\w*$/i,
+					alias: 'symbol',
+					inside: {
+						'punctuation': /^<<[-~]?'|'$/,
+					}
+				}
+			}
 		}
 	];
 
 	Prism.languages.rb = Prism.languages.ruby;
 }(Prism));
 
-(function(Prism) {
+(function (Prism) {
 	Prism.languages.crystal = Prism.languages.extend('ruby', {
 		keyword: [
 			/\b(?:abstract|alias|as|asm|begin|break|case|class|def|do|else|elsif|end|ensure|enum|extend|for|fun|if|include|instance_sizeof|lib|macro|module|next|of|out|pointerof|private|protected|rescue|return|require|select|self|sizeof|struct|super|then|type|typeof|uninitialized|union|unless|until|when|while|with|yield|__DIR__|__END_LINE__|__FILE__|__LINE__)\b/,
@@ -2117,26 +2254,26 @@ Prism.languages.coffee = Prism.languages.coffeescript;
 		},
 
 		expansion: [
-		{
-			pattern: /\{\{.+?\}\}/,
-			inside: {
-				delimiter: {
-					pattern: /^\{\{|\}\}$/,
-					alias: 'tag'
-				},
-				rest: Prism.languages.crystal
-			}
-		},
-		{
-			pattern: /\{%.+?%\}/,
-			inside: {
-				delimiter: {
-					pattern: /^\{%|%\}$/,
-					alias: 'tag'
-				},
-				rest: Prism.languages.crystal
+			{
+				pattern: /\{\{.+?\}\}/,
+				inside: {
+					delimiter: {
+						pattern: /^\{\{|\}\}$/,
+						alias: 'tag'
+					},
+					rest: Prism.languages.crystal
+				}
+			},
+			{
+				pattern: /\{%.+?%\}/,
+				inside: {
+					delimiter: {
+						pattern: /^\{%|%\}$/,
+						alias: 'tag'
+					},
+					rest: Prism.languages.crystal
+				}
 			}
-		}
 		]
 	});
 
@@ -2223,30 +2360,73 @@ Prism.languages.insertBefore('d', 'function', {
 	}
 });
 
-Prism.languages.dart = Prism.languages.extend('clike', {
-	'string': [
-		{
-			pattern: /r?("""|''')[\s\S]*?\1/,
-			greedy: true
-		},
-		{
-			pattern: /r?("|')(?:\\.|(?!\1)[^\\\r\n])*\1/,
-			greedy: true
-		}
-	],
-	'keyword': [
+(function (Prism) {
+	var keywords = [
 		/\b(?:async|sync|yield)\*/,
-		/\b(?:abstract|assert|async|await|break|case|catch|class|const|continue|covariant|default|deferred|do|dynamic|else|enum|export|extension|external|extends|factory|final|finally|for|Function|get|hide|if|implements|interface|import|in|library|mixin|new|null|on|operator|part|rethrow|return|set|show|static|super|switch|sync|this|throw|try|typedef|var|void|while|with|yield)\b/
-	],
-	'operator': /\bis!|\b(?:as|is)\b|\+\+|--|&&|\|\||<<=?|>>=?|~(?:\/=?)?|[+\-*\/%&^|=!<>]=?|\?/
-});
+		/\b(?:abstract|assert|async|await|break|case|catch|class|const|continue|covariant|default|deferred|do|dynamic|else|enum|export|extension|external|extends|factory|final|finally|for|get|hide|if|implements|interface|import|in|library|mixin|new|null|on|operator|part|rethrow|return|set|show|static|super|switch|sync|this|throw|try|typedef|var|void|while|with|yield)\b/
+	];
 
-Prism.languages.insertBefore('dart','function',{
-	'metadata': {
-		pattern: /@\w+/,
-		alias: 'symbol'
-	}
-});
+	// Handles named imports, such as http.Client
+	var packagePrefix = /(^|[^\w.])(?:[a-z]\w*\s*\.\s*)*(?:[A-Z]\w*\s*\.\s*)*/.source;
+
+	// based on the dart naming conventions
+	var className = {
+		pattern: RegExp(packagePrefix + /[A-Z](?:[\d_A-Z]*[a-z]\w*)?\b/.source),
+		lookbehind: true,
+		inside: {
+			'namespace': {
+				pattern: /^[a-z]\w*(?:\s*\.\s*[a-z]\w*)*(?:\s*\.)?/,
+				inside: {
+					'punctuation': /\./
+				}
+			},
+		}
+	};
+
+	Prism.languages.dart = Prism.languages.extend('clike', {
+		'string': [
+			{
+				pattern: /r?("""|''')[\s\S]*?\1/,
+				greedy: true
+			},
+			{
+				pattern: /r?(["'])(?:\\.|(?!\1)[^\\\r\n])*\1/,
+				greedy: true
+			}
+		],
+		'class-name': [
+			className,
+			{
+				// variables and parameters
+				// this to support class names (or generic parameters) which do not contain a lower case letter (also works for methods)
+				pattern: RegExp(packagePrefix + /[A-Z]\w*(?=\s+\w+\s*[;,=()])/.source),
+				lookbehind: true,
+				inside: className.inside
+			}
+		],
+		'keyword': keywords,
+		'operator': /\bis!|\b(?:as|is)\b|\+\+|--|&&|\|\||<<=?|>>=?|~(?:\/=?)?|[+\-*\/%&^|=!<>]=?|\?/
+	});
+
+	Prism.languages.insertBefore('dart', 'function', {
+		'metadata': {
+			pattern: /@\w+/,
+			alias: 'symbol'
+		}
+	});
+
+	Prism.languages.insertBefore('dart', 'class-name', {
+		'generics': {
+			pattern: /<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<[\w\s,.&?]*>)*>)*>)*>/,
+			inside: {
+				'class-name': className,
+				'keyword': keywords,
+				'punctuation': /[<>(),.:]/,
+				'operator': /[?&|]/
+			}
+		},
+	});
+}(Prism));
 
 (function (Prism) {
 
@@ -2285,8 +2465,8 @@ Prism.languages.insertBefore('dart','function',{
 		if (!/^\w+$/.test(name)) { // "deleted-sign" -> "deleted"
 			alias.push(/\w+/.exec(name)[0]);
 		}
-		if (name === "diff") {
-			alias.push("bold");
+		if (name === 'diff') {
+			alias.push('bold');
 		}
 
 		Prism.languages.diff[name] = {
@@ -2354,8 +2534,9 @@ Prism.languages.insertBefore('dart','function',{
 					var placeholder;
 
 					// Check for existing strings
-					while (env.code.indexOf(placeholder = getPlaceholder(language, i)) !== -1)
+					while (env.code.indexOf(placeholder = getPlaceholder(language, i)) !== -1) {
 						++i;
+					}
 
 					// Create a sparse array
 					tokenStack[i] = match;
@@ -2496,10 +2677,20 @@ Prism.languages.insertBefore('dart','function',{
 		markupTemplating.tokenizePlaceholders(env, 'jinja2');
 	});
 
-})(Prism);
+}(Prism));
 
 Prism.languages.elixir = {
-	'comment': /#.*/m,
+	'doc': {
+		pattern: /@(?:doc|moduledoc)\s+(?:("""|''')[\s\S]*?\1|("|')(?:\\(?:\r\n|[\s\S])|(?!\2)[^\\\r\n])*\2)/,
+		inside: {
+			'attribute': /^@\w+/,
+			'string': /['"][\s\S]+/
+		}
+	},
+	'comment': {
+		pattern: /#.*/m,
+		greedy: true
+	},
 	// ~r"""foo""" (multi-line), ~r'''foo''' (multi-line), ~r/foo/, ~r|foo|, ~r"foo", ~r'foo', ~r(foo), ~r[foo], ~r{foo}, ~r<foo>
 	'regex': {
 		pattern: /~[rR](?:("""|''')(?:\\[\s\S]|(?!\1)[^\\])+\1|([\/|"'])(?:\\.|(?!\2)[^\\\r\n])+\2|\((?:\\.|[^\\)\r\n])+\)|\[(?:\\.|[^\\\]\r\n])+\]|\{(?:\\.|[^\\}\r\n])+\}|<(?:\\.|[^\\>\r\n])+>)[uismxfr]*/,
@@ -2536,14 +2727,12 @@ Prism.languages.elixir = {
 		lookbehind: true,
 		alias: 'symbol'
 	},
+	'module': {
+		pattern: /\b[A-Z]\w*\b/,
+		alias: 'class-name'
+	},
 	// Look-ahead prevents bad highlighting of the :: operator
 	'attr-name': /\w+\??:(?!:)/,
-	'capture': {
-		// Look-behind prevents bad highlighting of the && operator
-		pattern: /(^|[^&])&(?:[^&\s\d()][^\s()]*|(?=\())/,
-		lookbehind: true,
-		alias: 'function'
-	},
 	'argument': {
 		// Look-behind prevents bad highlighting of the && operator
 		pattern: /(^|[^&])&\d+/,
@@ -2554,8 +2743,9 @@ Prism.languages.elixir = {
 		pattern: /@\w+/,
 		alias: 'variable'
 	},
+	'function': /\b[_a-zA-Z]\w*[?!]?(?:(?=\s*(?:\.\s*)?\()|(?=\/\d+))/,
 	'number': /\b(?:0[box][a-f\d_]+|\d[\d_]*)(?:\.[\d_]+)?(?:e[+-]?[\d_]+)?\b/i,
-	'keyword': /\b(?:after|alias|and|case|catch|cond|def(?:callback|exception|impl|module|p|protocol|struct|delegate)?|do|else|end|fn|for|if|import|not|or|require|rescue|try|unless|use|when)\b/,
+	'keyword': /\b(?:after|alias|and|case|catch|cond|def(?:callback|exception|impl|module|p|protocol|struct|delegate)?|do|else|end|fn|for|if|import|not|or|raise|require|rescue|try|unless|use|when)\b/,
 	'boolean': /\b(?:true|false|nil)\b/,
 	'operator': [
 		/\bin\b|&&?|\|[|>]?|\\\\|::|\.\.\.?|\+\+?|-[->]?|<[-=>]|>=|!==?|\B!|=(?:==?|[>~])?|[*\/^]/,
@@ -2573,19 +2763,7 @@ Prism.languages.elixir = {
 	'punctuation': /<<|>>|[.,%\[\]{}()]/
 };
 
-Prism.languages.insertBefore('elixir', 'keyword', {
-	'module': {
-		pattern: /\b(defmodule\s)[A-Z][\w.\\]+/,
-		lookbehind: true,
-		alias: 'class-name'
-	},
-	'function': {
-		pattern: /\b(defp?\s)[\w.\\]+/,
-		lookbehind: true
-	}
-});
-
-Prism.languages.elixir.string.forEach(function(o) {
+Prism.languages.elixir.string.forEach(function (o) {
 	o.inside = {
 		'interpolation': {
 			pattern: /#\{[^}]+\}/,
@@ -2701,7 +2879,7 @@ Prism.languages.insertBefore('groovy', 'function', {
 });
 
 // Handle string interpolation
-Prism.hooks.add('wrap', function(env) {
+Prism.hooks.add('wrap', function (env) {
 	if (env.language === 'groovy' && env.type === 'string') {
 		var delimiter = env.content[0];
 
@@ -2791,7 +2969,7 @@ Prism.hooks.add('wrap', function(env) {
 			alias: 'punctuation'
 		},
 		'generics': {
-			pattern: /<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<(?:[\w\s,.&?]|<[\w\s,.&?]*>)*>)*>)*>/,
+			pattern: /<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&)|<(?:[\w\s,.?]|&(?!&))*>)*>)*>)*>/,
 			inside: {
 				'class-name': className,
 				'keyword': keywords,
@@ -2893,7 +3071,7 @@ Prism.languages.julia = {
 		'operator': /\+[+=]?|-[-=>]?|==?=?|!(?:!|==?)?|[\/*%<>]=?|[?:]:?|\.\.|&&|\|\||\b(?:and|inv|or|shl|shr|ushr|xor)\b/
 	});
 
-	delete Prism.languages.kotlin["class-name"];
+	delete Prism.languages.kotlin['class-name'];
 
 	Prism.languages.insertBefore('kotlin', 'string', {
 		'raw-string': {
@@ -2940,6 +3118,71 @@ Prism.languages.julia = {
 	Prism.languages.kts = Prism.languages.kotlin;
 }(Prism));
 
+(function (Prism) {
+	var funcPattern = /\\(?:[^a-z()[\]]|[a-z*]+)/i;
+	var insideEqu = {
+		'equation-command': {
+			pattern: funcPattern,
+			alias: 'regex'
+		}
+	};
+
+	Prism.languages.latex = {
+		'comment': /%.*/m,
+		// the verbatim environment prints whitespace to the document
+		'cdata': {
+			pattern: /(\\begin\{((?:verbatim|lstlisting)\*?)\})[\s\S]*?(?=\\end\{\2\})/,
+			lookbehind: true
+		},
+		/*
+		 * equations can be between $$ $$ or $ $ or \( \) or \[ \]
+		 * (all are multiline)
+		 */
+		'equation': [
+			{
+				pattern: /\$\$(?:\\[\s\S]|[^\\$])+\$\$|\$(?:\\[\s\S]|[^\\$])+\$|\\\([\s\S]*?\\\)|\\\[[\s\S]*?\\\]/,
+				inside: insideEqu,
+				alias: 'string'
+			},
+			{
+				pattern: /(\\begin\{((?:equation|math|eqnarray|align|multline|gather)\*?)\})[\s\S]*?(?=\\end\{\2\})/,
+				lookbehind: true,
+				inside: insideEqu,
+				alias: 'string'
+			}
+		],
+		/*
+		 * arguments which are keywords or references are highlighted
+		 * as keywords
+		 */
+		'keyword': {
+			pattern: /(\\(?:begin|end|ref|cite|label|usepackage|documentclass)(?:\[[^\]]+\])?\{)[^}]+(?=\})/,
+			lookbehind: true
+		},
+		'url': {
+			pattern: /(\\url\{)[^}]+(?=\})/,
+			lookbehind: true
+		},
+		/*
+		 * section or chapter headlines are highlighted as bold so that
+		 * they stand out more
+		 */
+		'headline': {
+			pattern: /(\\(?:part|chapter|section|subsection|frametitle|subsubsection|paragraph|subparagraph|subsubparagraph|subsubsubparagraph)\*?(?:\[[^\]]+\])?\{)[^}]+(?=\}(?:\[[^\]]+\])?)/,
+			lookbehind: true,
+			alias: 'class-name'
+		},
+		'function': {
+			pattern: funcPattern,
+			alias: 'selector'
+		},
+		'punctuation': /[[\]{}&]/
+	};
+
+	Prism.languages.tex = Prism.languages.latex;
+	Prism.languages.context = Prism.languages.latex;
+}(Prism));
+
 Prism.languages.lua = {
 	'comment': /^#!.+|--(?:\[(=*)\[[\s\S]*?\]\1\]|.*)/m,
 	// \z may be used to skip the following space
@@ -2978,17 +3221,58 @@ Prism.languages.matlab = {
 	'punctuation': /\.{3}|[.,;\[\](){}!]/
 };
 
-Prism.languages.nginx = Prism.languages.extend('clike', {
-	'comment': {
-		pattern: /(^|[^"{\\])#.*/,
-		lookbehind: true
-	},
-	'keyword': /\b(?:CONTENT_|DOCUMENT_|GATEWAY_|HTTP_|HTTPS|if_not_empty|PATH_|QUERY_|REDIRECT_|REMOTE_|REQUEST_|SCGI|SCRIPT_|SERVER_|http|events|accept_mutex|accept_mutex_delay|access_log|add_after_body|add_before_body|add_header|addition_types|aio|alias|allow|ancient_browser|ancient_browser_value|auth|auth_basic|auth_basic_user_file|auth_http|auth_http_header|auth_http_timeout|autoindex|autoindex_exact_size|autoindex_localtime|break|charset|charset_map|charset_types|chunked_transfer_encoding|client_body_buffer_size|client_body_in_file_only|client_body_in_single_buffer|client_body_temp_path|client_body_timeout|client_header_buffer_size|client_header_timeout|client_max_body_size|connection_pool_size|create_full_put_path|daemon|dav_access|dav_methods|debug_connection|debug_points|default_type|deny|devpoll_changes|devpoll_events|directio|directio_alignment|disable_symlinks|empty_gif|env|epoll_events|error_log|error_page|expires|fastcgi_buffer_size|fastcgi_buffers|fastcgi_busy_buffers_size|fastcgi_cache|fastcgi_cache_bypass|fastcgi_cache_key|fastcgi_cache_lock|fastcgi_cache_lock_timeout|fastcgi_cache_methods|fastcgi_cache_min_uses|fastcgi_cache_path|fastcgi_cache_purge|fastcgi_cache_use_stale|fastcgi_cache_valid|fastcgi_connect_timeout|fastcgi_hide_header|fastcgi_ignore_client_abort|fastcgi_ignore_headers|fastcgi_index|fastcgi_intercept_errors|fastcgi_keep_conn|fastcgi_max_temp_file_size|fastcgi_next_upstream|fastcgi_no_cache|fastcgi_param|fastcgi_pass|fastcgi_pass_header|fastcgi_read_timeout|fastcgi_redirect_errors|fastcgi_send_timeout|fastcgi_split_path_info|fastcgi_store|fastcgi_store_access|fastcgi_temp_file_write_size|fastcgi_temp_path|flv|geo|geoip_city|geoip_country|google_perftools_profiles|gzip|gzip_buffers|gzip_comp_level|gzip_disable|gzip_http_version|gzip_min_length|gzip_proxied|gzip_static|gzip_types|gzip_vary|if|if_modified_since|ignore_invalid_headers|image_filter|image_filter_buffer|image_filter_jpeg_quality|image_filter_sharpen|image_filter_transparency|imap_capabilities|imap_client_buffer|include|index|internal|ip_hash|keepalive|keepalive_disable|keepalive_requests|keepalive_timeout|kqueue_changes|kqueue_events|large_client_header_buffers|limit_conn|limit_conn_log_level|limit_conn_zone|limit_except|limit_rate|limit_rate_after|limit_req|limit_req_log_level|limit_req_zone|limit_zone|lingering_close|lingering_time|lingering_timeout|listen|location|lock_file|log_format|log_format_combined|log_not_found|log_subrequest|map|map_hash_bucket_size|map_hash_max_size|master_process|max_ranges|memcached_buffer_size|memcached_connect_timeout|memcached_next_upstream|memcached_pass|memcached_read_timeout|memcached_send_timeout|merge_slashes|min_delete_depth|modern_browser|modern_browser_value|mp4|mp4_buffer_size|mp4_max_buffer_size|msie_padding|msie_refresh|multi_accept|open_file_cache|open_file_cache_errors|open_file_cache_min_uses|open_file_cache_valid|open_log_file_cache|optimize_server_names|override_charset|pcre_jit|perl|perl_modules|perl_require|perl_set|pid|pop3_auth|pop3_capabilities|port_in_redirect|post_action|postpone_output|protocol|proxy|proxy_buffer|proxy_buffer_size|proxy_buffering|proxy_buffers|proxy_busy_buffers_size|proxy_cache|proxy_cache_bypass|proxy_cache_key|proxy_cache_lock|proxy_cache_lock_timeout|proxy_cache_methods|proxy_cache_min_uses|proxy_cache_path|proxy_cache_use_stale|proxy_cache_valid|proxy_connect_timeout|proxy_cookie_domain|proxy_cookie_path|proxy_headers_hash_bucket_size|proxy_headers_hash_max_size|proxy_hide_header|proxy_http_version|proxy_ignore_client_abort|proxy_ignore_headers|proxy_intercept_errors|proxy_max_temp_file_size|proxy_method|proxy_next_upstream|proxy_no_cache|proxy_pass|proxy_pass_error_message|proxy_pass_header|proxy_pass_request_body|proxy_pass_request_headers|proxy_read_timeout|proxy_redirect|proxy_redirect_errors|proxy_send_lowat|proxy_send_timeout|proxy_set_body|proxy_set_header|proxy_ssl_session_reuse|proxy_store|proxy_store_access|proxy_temp_file_write_size|proxy_temp_path|proxy_timeout|proxy_upstream_fail_timeout|proxy_upstream_max_fails|random_index|read_ahead|real_ip_header|recursive_error_pages|request_pool_size|reset_timedout_connection|resolver|resolver_timeout|return|rewrite|root|rtsig_overflow_events|rtsig_overflow_test|rtsig_overflow_threshold|rtsig_signo|satisfy|satisfy_any|secure_link_secret|send_lowat|send_timeout|sendfile|sendfile_max_chunk|server|server_name|server_name_in_redirect|server_names_hash_bucket_size|server_names_hash_max_size|server_tokens|set|set_real_ip_from|smtp_auth|smtp_capabilities|so_keepalive|source_charset|split_clients|ssi|ssi_silent_errors|ssi_types|ssi_value_length|ssl|ssl_certificate|ssl_certificate_key|ssl_ciphers|ssl_client_certificate|ssl_crl|ssl_dhparam|ssl_engine|ssl_prefer_server_ciphers|ssl_protocols|ssl_session_cache|ssl_session_timeout|ssl_verify_client|ssl_verify_depth|starttls|stub_status|sub_filter|sub_filter_once|sub_filter_types|tcp_nodelay|tcp_nopush|timeout|timer_resolution|try_files|types|types_hash_bucket_size|types_hash_max_size|underscores_in_headers|uninitialized_variable_warn|upstream|use|user|userid|userid_domain|userid_expires|userid_name|userid_p3p|userid_path|userid_service|valid_referers|variables_hash_bucket_size|variables_hash_max_size|worker_connections|worker_cpu_affinity|worker_priority|worker_processes|worker_rlimit_core|worker_rlimit_nofile|worker_rlimit_sigpending|working_directory|xclient|xml_entities|xslt_entities|xslt_stylesheet|xslt_types|ssl_session_tickets|ssl_stapling|ssl_stapling_verify|ssl_ecdh_curve|ssl_trusted_certificate|more_set_headers|ssl_early_data)\b/i
-});
+(function (Prism) {
 
-Prism.languages.insertBefore('nginx', 'keyword', {
-	'variable': /\$[a-z_]+/i
-});
+	var variable = /\$(?:\w[a-z\d]*(?:_[^\x00-\x1F\s"'\\()$]*)?|\{[^}\s"'\\]+\})/i;
+
+	Prism.languages.nginx = {
+		'comment': {
+			pattern: /(^|[\s{};])#.*/,
+			lookbehind: true
+		},
+		'directive': {
+			pattern: /(^|\s)\w(?:[^;{}"'\\\s]|\\.|"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*'|\s+(?:#.*(?!.)|(?![#\s])))*?(?=\s*[;{])/,
+			lookbehind: true,
+			greedy: true,
+			inside: {
+				'string': {
+					pattern: /((?:^|[^\\])(?:\\\\)*)(?:"(?:[^"\\]|\\.)*"|'(?:[^'\\]|\\.)*')/,
+					lookbehind: true,
+					inside: {
+						'escape': {
+							pattern: /\\["'\\nrt]/,
+							alias: 'entity'
+						},
+						'variable': variable
+					}
+				},
+				'comment': {
+					pattern: /(\s)#.*/,
+					lookbehind: true,
+					greedy: true
+				},
+				'keyword': {
+					pattern: /^\S+/,
+					greedy: true
+				},
+
+				// other patterns
+
+				'boolean': {
+					pattern: /(\s)(?:off|on)(?!\S)/,
+					lookbehind: true
+				},
+				'number': {
+					pattern: /(\s)\d+[a-z]*(?!\S)/i,
+					lookbehind: true
+				},
+				'variable': variable
+			}
+		},
+		'punctuation': /[{};]/
+	};
+
+}(Prism));
 
 Prism.languages.nim = {
 	'comment': /#.*/,
@@ -3023,6 +3307,7 @@ Prism.languages.nim = {
 	},
 	'punctuation': /[({\[]\.|\.[)}\]]|[`(){}\[\],:]/
 };
+
 Prism.languages.ocaml = {
 	'comment': /\(\*[\s\S]*?\*\)/,
 	'string': [
@@ -3228,7 +3513,7 @@ Prism.languages.perl = {
 		// ${...}
 		/[&*$@%]#?(?=\{)/,
 		// $foo
-		/[&*$@%]#?(?:(?:::)*'?(?!\d)[\w$]+)+(?:::)*/i,
+		/[&*$@%]#?(?:(?:::)*'?(?!\d)[\w$]+(?![\w$]))+(?:::)*/i,
 		// $1
 		/[&*$@%]\d+/,
 		// $_, @_, %!
@@ -3271,8 +3556,18 @@ Prism.languages.perl = {
 			pattern: /\b(?:false|true)\b/i,
 			alias: 'boolean'
 		},
-		/\b[A-Z_][A-Z0-9_]*\b(?!\s*\()/,
+		{
+			pattern: /(::\s*)\b[a-z_]\w*\b(?!\s*\()/i,
+			greedy: true,
+			lookbehind: true,
+		},
+		{
+			pattern: /(\b(?:case|const)\s+)\b[a-z_]\w*(?=\s*[;=])/i,
+			greedy: true,
+			lookbehind: true,
+		},
 		/\b(?:null)\b/i,
+		/\b[A-Z_][A-Z0-9_]*\b(?!\s*\()/,
 	];
 	var number = /\b0b[01]+(?:_[01]+)*\b|\b0o[0-7]+(?:_[0-7]+)*\b|\b0x[\da-f]+(?:_[\da-f]+)*\b|(?:\b\d+(?:_\d+)*\.?(?:\d+(?:_\d+)*)?|\B\.\d+)(?:e[+-]?\d+)?/i;
 	var operator = /<?=>|\?\?=?|\.{3}|\??->|[!=]=?=?|::|\*\*=?|--|\+\+|&&|\|\||<<|>>|[?~]|[/^|%*&<>.+-]=?/;
@@ -3297,6 +3592,11 @@ Prism.languages.perl = {
 			lookbehind: true,
 			alias: 'class-name'
 		},
+		'function-definition': {
+			pattern: /(\bfunction\s+)[a-z_]\w*(?=\s*\()/i,
+			lookbehind: true,
+			alias: 'function'
+		},
 		'keyword': [
 			{
 				pattern: /(\(\s*)\b(?:bool|boolean|int|integer|float|string|object|array)\b(?=\s*\))/i,
@@ -3344,9 +3644,26 @@ Prism.languages.perl = {
 				alias: 'static-context',
 				greedy: true
 			},
-			/\b(?:__halt_compiler|abstract|and|array|as|break|callable|case|catch|class|clone|const|continue|declare|default|die|do|echo|else|elseif|empty|enddeclare|endfor|endforeach|endif|endswitch|endwhile|enum|eval|exit|extends|final|finally|for|foreach|function|global|goto|if|implements|include|include_once|instanceof|insteadof|interface|isset|list|namespace|match|new|or|parent|print|private|protected|public|require|require_once|return|self|static|switch|throw|trait|try|unset|use|var|while|xor|yield)\b/i
+			{
+				// yield from
+				pattern: /(\byield\s+)from\b/i,
+				lookbehind: true
+			},
+			// `class` is always a keyword unlike other keywords
+			/\bclass\b/i,
+			{
+				// https://www.php.net/manual/en/reserved.keywords.php
+				//
+				// keywords cannot be preceded by "->"
+				// the complex lookbehind means `(?<!(?:->|::)\s*)`
+				pattern: /((?:^|[^\s>:]|(?:^|[^-])>|(?:^|[^:]):)\s*)\b(?:__halt_compiler|abstract|and|array|as|break|callable|case|catch|clone|const|continue|declare|default|die|do|echo|else|elseif|empty|enddeclare|endfor|endforeach|endif|endswitch|endwhile|enum|eval|exit|extends|final|finally|fn|for|foreach|function|global|goto|if|implements|include|include_once|instanceof|insteadof|interface|isset|list|namespace|match|new|or|parent|print|private|protected|public|require|require_once|return|self|static|switch|throw|trait|try|unset|use|var|while|xor|yield)\b/i,
+				lookbehind: true
+			}
 		],
-		'argument-name': /\b[a-z_]\w*(?=\s*:(?!:))/i,
+		'argument-name': {
+			pattern: /([(,]\s+)\b[a-z_]\w*(?=\s*:(?!:))/i,
+			lookbehind: true
+		},
 		'class-name': [
 			{
 				pattern: /(\b(?:extends|implements|instanceof|new(?!\s+self|\s+static))\s+|\bcatch\s*\()\b[a-z_]\w*(?!\\)\b/i,
@@ -3446,9 +3763,15 @@ Prism.languages.perl = {
 			}
 		],
 		'constant': constant,
-		'function': /\w+\s*(?=\()/,
+		'function': {
+			pattern: /(^|[^\\\w])\\?[a-z_](?:[\w\\]*\w)?(?=\s*\()/i,
+			lookbehind: true,
+			inside: {
+				'punctuation': /\\/
+			}
+		},
 		'property': {
-			pattern: /(->)[\w]+/,
+			pattern: /(->\s*)\w+/,
 			lookbehind: true
 		},
 		'number': number,
@@ -3457,7 +3780,7 @@ Prism.languages.perl = {
 	};
 
 	var string_interpolation = {
-		pattern: /{\$(?:{(?:{[^{}]+}|[^{}]+)}|[^{}])+}|(^|[^\\{])\$+(?:\w+(?:\[[^\r\n\[\]]+\]|->\w+)*)/,
+		pattern: /{\$(?:{(?:{[^{}]+}|[^{}]+)}|[^{}])+}|(^|[^\\{])\$+(?:\w+(?:\[[^\r\n\[\]]+\]|->\w+)?)/,
 		lookbehind: true,
 		inside: Prism.languages.php
 	};
@@ -3489,7 +3812,7 @@ Prism.languages.perl = {
 						'punctuation': /^<<<"?|[";]$/
 					}
 				},
-				'interpolation': string_interpolation // See below
+				'interpolation': string_interpolation
 			}
 		},
 		{
@@ -3507,16 +3830,13 @@ Prism.languages.perl = {
 			alias: 'double-quoted-string',
 			greedy: true,
 			inside: {
-				'interpolation': string_interpolation // See below
+				'interpolation': string_interpolation
 			}
 		}
 	];
 
 	Prism.languages.insertBefore('php', 'variable', {
 		'string': string,
-	});
-
-	Prism.languages.insertBefore('php', 'variable', {
 		'attribute': {
 			pattern: /#\[(?:[^"'\/#]|\/(?![*/])|\/\/.*$|#(?!\[).*$|\/\*(?:[^*]|\*(?!\/))*\*\/|"(?:\\[\s\S]|[^\\"])*"|'(?:\\[\s\S]|[^\\'])*')+\](?=\s*[a-z$#])/mi,
 			greedy: true,
@@ -3562,7 +3882,7 @@ Prism.languages.perl = {
 		},
 	});
 
-	Prism.hooks.add('before-tokenize', function(env) {
+	Prism.hooks.add('before-tokenize', function (env) {
 		if (!/<\?/.test(env.code)) {
 			return;
 		}
@@ -3571,7 +3891,7 @@ Prism.languages.perl = {
 		Prism.languages['markup-templating'].buildPlaceholders(env, 'php', phpPattern);
 	});
 
-	Prism.hooks.add('after-tokenize', function(env) {
+	Prism.hooks.add('after-tokenize', function (env) {
 		Prism.languages['markup-templating'].tokenizePlaceholders(env, 'php');
 	});
 
@@ -3642,149 +3962,149 @@ Prism.languages.python['string-interpolation'].inside['interpolation'].inside.re
 
 Prism.languages.py = Prism.languages.python;
 
-(function(Prism) {
+(function (Prism) {
 
-var javascript = Prism.util.clone(Prism.languages.javascript);
+	var javascript = Prism.util.clone(Prism.languages.javascript);
 
-var space = /(?:\s|\/\/.*(?!.)|\/\*(?:[^*]|\*(?!\/))\*\/)/.source;
-var braces = /(?:\{(?:\{(?:\{[^{}]*\}|[^{}])*\}|[^{}])*\})/.source;
-var spread = /(?:\{<S>*\.{3}(?:[^{}]|<BRACES>)*\})/.source;
+	var space = /(?:\s|\/\/.*(?!.)|\/\*(?:[^*]|\*(?!\/))\*\/)/.source;
+	var braces = /(?:\{(?:\{(?:\{[^{}]*\}|[^{}])*\}|[^{}])*\})/.source;
+	var spread = /(?:\{<S>*\.{3}(?:[^{}]|<BRACES>)*\})/.source;
 
-/**
- * @param {string} source
- * @param {string} [flags]
- */
-function re(source, flags) {
-	source = source
-		.replace(/<S>/g, function () { return space; })
-		.replace(/<BRACES>/g, function () { return braces; })
-		.replace(/<SPREAD>/g, function () { return spread; });
-	return RegExp(source, flags);
-}
+	/**
+	 * @param {string} source
+	 * @param {string} [flags]
+	 */
+	function re(source, flags) {
+		source = source
+			.replace(/<S>/g, function () { return space; })
+			.replace(/<BRACES>/g, function () { return braces; })
+			.replace(/<SPREAD>/g, function () { return spread; });
+		return RegExp(source, flags);
+	}
 
-spread = re(spread).source;
+	spread = re(spread).source;
 
 
-Prism.languages.jsx = Prism.languages.extend('markup', javascript);
-Prism.languages.jsx.tag.pattern = re(
-	/<\/?(?:[\w.:-]+(?:<S>+(?:[\w.:$-]+(?:=(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s{'"/>=]+|<BRACES>))?|<SPREAD>))*<S>*\/?)?>/.source
-);
+	Prism.languages.jsx = Prism.languages.extend('markup', javascript);
+	Prism.languages.jsx.tag.pattern = re(
+		/<\/?(?:[\w.:-]+(?:<S>+(?:[\w.:$-]+(?:=(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s{'"/>=]+|<BRACES>))?|<SPREAD>))*<S>*\/?)?>/.source
+	);
 
-Prism.languages.jsx.tag.inside['tag'].pattern = /^<\/?[^\s>\/]*/i;
-Prism.languages.jsx.tag.inside['attr-value'].pattern = /=(?!\{)(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s'">]+)/i;
-Prism.languages.jsx.tag.inside['tag'].inside['class-name'] = /^[A-Z]\w*(?:\.[A-Z]\w*)*$/;
-Prism.languages.jsx.tag.inside['comment'] = javascript['comment'];
+	Prism.languages.jsx.tag.inside['tag'].pattern = /^<\/?[^\s>\/]*/i;
+	Prism.languages.jsx.tag.inside['attr-value'].pattern = /=(?!\{)(?:"(?:\\[^]|[^\\"])*"|'(?:\\[^]|[^\\'])*'|[^\s'">]+)/i;
+	Prism.languages.jsx.tag.inside['tag'].inside['class-name'] = /^[A-Z]\w*(?:\.[A-Z]\w*)*$/;
+	Prism.languages.jsx.tag.inside['comment'] = javascript['comment'];
 
-Prism.languages.insertBefore('inside', 'attr-name', {
-	'spread': {
-		pattern: re(/<SPREAD>/.source),
-		inside: Prism.languages.jsx
-	}
-}, Prism.languages.jsx.tag);
+	Prism.languages.insertBefore('inside', 'attr-name', {
+		'spread': {
+			pattern: re(/<SPREAD>/.source),
+			inside: Prism.languages.jsx
+		}
+	}, Prism.languages.jsx.tag);
 
-Prism.languages.insertBefore('inside', 'attr-value',{
-	'script': {
-		// Allow for two levels of nesting
-		pattern: re(/=<BRACES>/.source),
-		inside: {
-			'script-punctuation': {
-				pattern: /^=(?={)/,
-				alias: 'punctuation'
+	Prism.languages.insertBefore('inside', 'special-attr', {
+		'script': {
+			// Allow for two levels of nesting
+			pattern: re(/=<BRACES>/.source),
+			inside: {
+				'script-punctuation': {
+					pattern: /^=(?={)/,
+					alias: 'punctuation'
+				},
+				rest: Prism.languages.jsx
 			},
-			rest: Prism.languages.jsx
-		},
-		'alias': 'language-javascript'
-	}
-}, Prism.languages.jsx.tag);
+			'alias': 'language-javascript'
+		}
+	}, Prism.languages.jsx.tag);
 
-// The following will handle plain text inside tags
-var stringifyToken = function (token) {
-	if (!token) {
-		return '';
-	}
-	if (typeof token === 'string') {
-		return token;
-	}
-	if (typeof token.content === 'string') {
-		return token.content;
-	}
-	return token.content.map(stringifyToken).join('');
-};
+	// The following will handle plain text inside tags
+	var stringifyToken = function (token) {
+		if (!token) {
+			return '';
+		}
+		if (typeof token === 'string') {
+			return token;
+		}
+		if (typeof token.content === 'string') {
+			return token.content;
+		}
+		return token.content.map(stringifyToken).join('');
+	};
 
-var walkTokens = function (tokens) {
-	var openedTags = [];
-	for (var i = 0; i < tokens.length; i++) {
-		var token = tokens[i];
-		var notTagNorBrace = false;
-
-		if (typeof token !== 'string') {
-			if (token.type === 'tag' && token.content[0] && token.content[0].type === 'tag') {
-				// We found a tag, now find its kind
-
-				if (token.content[0].content[0].content === '</') {
-					// Closing tag
-					if (openedTags.length > 0 && openedTags[openedTags.length - 1].tagName === stringifyToken(token.content[0].content[1])) {
-						// Pop matching opening tag
-						openedTags.pop();
-					}
-				} else {
-					if (token.content[token.content.length - 1].content === '/>') {
-						// Autoclosed tag, ignore
+	var walkTokens = function (tokens) {
+		var openedTags = [];
+		for (var i = 0; i < tokens.length; i++) {
+			var token = tokens[i];
+			var notTagNorBrace = false;
+
+			if (typeof token !== 'string') {
+				if (token.type === 'tag' && token.content[0] && token.content[0].type === 'tag') {
+					// We found a tag, now find its kind
+
+					if (token.content[0].content[0].content === '</') {
+						// Closing tag
+						if (openedTags.length > 0 && openedTags[openedTags.length - 1].tagName === stringifyToken(token.content[0].content[1])) {
+							// Pop matching opening tag
+							openedTags.pop();
+						}
 					} else {
-						// Opening tag
-						openedTags.push({
-							tagName: stringifyToken(token.content[0].content[1]),
-							openedBraces: 0
-						});
+						if (token.content[token.content.length - 1].content === '/>') {
+							// Autoclosed tag, ignore
+						} else {
+							// Opening tag
+							openedTags.push({
+								tagName: stringifyToken(token.content[0].content[1]),
+								openedBraces: 0
+							});
+						}
 					}
-				}
-			} else if (openedTags.length > 0 && token.type === 'punctuation' && token.content === '{') {
+				} else if (openedTags.length > 0 && token.type === 'punctuation' && token.content === '{') {
 
-				// Here we might have entered a JSX context inside a tag
-				openedTags[openedTags.length - 1].openedBraces++;
+					// Here we might have entered a JSX context inside a tag
+					openedTags[openedTags.length - 1].openedBraces++;
 
-			} else if (openedTags.length > 0 && openedTags[openedTags.length - 1].openedBraces > 0 && token.type === 'punctuation' && token.content === '}') {
+				} else if (openedTags.length > 0 && openedTags[openedTags.length - 1].openedBraces > 0 && token.type === 'punctuation' && token.content === '}') {
 
-				// Here we might have left a JSX context inside a tag
-				openedTags[openedTags.length - 1].openedBraces--;
+					// Here we might have left a JSX context inside a tag
+					openedTags[openedTags.length - 1].openedBraces--;
 
-			} else {
-				notTagNorBrace = true
-			}
-		}
-		if (notTagNorBrace || typeof token === 'string') {
-			if (openedTags.length > 0 && openedTags[openedTags.length - 1].openedBraces === 0) {
-				// Here we are inside a tag, and not inside a JSX context.
-				// That's plain text: drop any tokens matched.
-				var plainText = stringifyToken(token);
-
-				// And merge text with adjacent text
-				if (i < tokens.length - 1 && (typeof tokens[i + 1] === 'string' || tokens[i + 1].type === 'plain-text')) {
-					plainText += stringifyToken(tokens[i + 1]);
-					tokens.splice(i + 1, 1);
+				} else {
+					notTagNorBrace = true;
 				}
-				if (i > 0 && (typeof tokens[i - 1] === 'string' || tokens[i - 1].type === 'plain-text')) {
-					plainText = stringifyToken(tokens[i - 1]) + plainText;
-					tokens.splice(i - 1, 1);
-					i--;
+			}
+			if (notTagNorBrace || typeof token === 'string') {
+				if (openedTags.length > 0 && openedTags[openedTags.length - 1].openedBraces === 0) {
+					// Here we are inside a tag, and not inside a JSX context.
+					// That's plain text: drop any tokens matched.
+					var plainText = stringifyToken(token);
+
+					// And merge text with adjacent text
+					if (i < tokens.length - 1 && (typeof tokens[i + 1] === 'string' || tokens[i + 1].type === 'plain-text')) {
+						plainText += stringifyToken(tokens[i + 1]);
+						tokens.splice(i + 1, 1);
+					}
+					if (i > 0 && (typeof tokens[i - 1] === 'string' || tokens[i - 1].type === 'plain-text')) {
+						plainText = stringifyToken(tokens[i - 1]) + plainText;
+						tokens.splice(i - 1, 1);
+						i--;
+					}
+
+					tokens[i] = new Prism.Token('plain-text', plainText, null, plainText);
 				}
+			}
 
-				tokens[i] = new Prism.Token('plain-text', plainText, null, plainText);
+			if (token.content && typeof token.content !== 'string') {
+				walkTokens(token.content);
 			}
 		}
+	};
 
-		if (token.content && typeof token.content !== 'string') {
-			walkTokens(token.content);
+	Prism.hooks.add('after-tokenize', function (env) {
+		if (env.language !== 'jsx' && env.language !== 'tsx') {
+			return;
 		}
-	}
-};
-
-Prism.hooks.add('after-tokenize', function (env) {
-	if (env.language !== 'jsx' && env.language !== 'tsx') {
-		return;
-	}
-	walkTokens(env.tokens);
-});
+		walkTokens(env.tokens);
+	});
 
 }(Prism));
 
@@ -4007,17 +4327,26 @@ Prism.languages.scss['atrule'].inside.rest = Prism.languages.scss;
 
 	var strings = [
 		// normal string
-		// 1 capturing group
-		/(["'])(?:\\[\s\S]|\$\([^)]+\)|\$(?!\()|`[^`]+`|(?!\1)[^\\`$])*\1/.source,
+		/"(?:\\[\s\S]|\$\([^)]+\)|\$(?!\()|`[^`]+`|[^"\\`$])*"/.source,
+		/'[^']*'/.source,
+		/\$'(?:[^'\\]|\\[\s\S])*'/.source,
 
 		// here doc
 		// 2 capturing groups
-		/<<-?\s*(["']?)(\w+)\2\s[\s\S]*?[\r\n]\3/.source
+		/<<-?\s*(["']?)(\w+)\1\s[\s\S]*?[\r\n]\2/.source
 	].join('|');
 
 	Prism.languages['shell-session'] = {
 		'command': {
-			pattern: RegExp(/^(?:[^\s@:$#*!/\\]+@[^\s@:$#*!/\\]+(?::[^\0-\x1F$#*?"<>:;|]+)?|[^\0-\x1F$#*?"<>:;|]+)?[$#](?:[^\\\r\n'"<]|\\.|<<str>>)+/.source.replace(/<<str>>/g, function () { return strings; }), 'm'),
+			pattern: RegExp(
+				// user info
+				/^(?:[^\s@:$#*!/\\]+@[^\s@:$#*!/\\]+(?::[^\0-\x1F$#*?"<>:;|]+)?|[^\0-\x1F$#*?"<>:;|]+)?/.source +
+				// shell symbol
+				/[$#]/.source +
+				// bash command
+				/(?:[^\\\r\n'"<$]|\\(?:[^\r]|\r\n?)|\$(?!')|<<str>>)+/.source.replace(/<<str>>/g, function () { return strings; }),
+				'm'
+			),
 			greedy: true,
 			inside: {
 				'info': {
@@ -4085,11 +4414,16 @@ Prism.languages.sql = {
 			greedy: true,
 			inside: null // see below
 		},
-		// From JavaScript Prism keyword list and TypeScript language spec: https://github.com/Microsoft/TypeScript/blob/master/doc/spec.md#221-reserved-words
-		'keyword': /\b(?:abstract|as|asserts|async|await|break|case|catch|class|const|constructor|continue|debugger|declare|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|is|keyof|let|module|namespace|new|null|of|package|private|protected|public|readonly|return|require|set|static|super|switch|this|throw|try|type|typeof|undefined|var|void|while|with|yield)\b/,
 		'builtin': /\b(?:string|Function|any|number|boolean|Array|symbol|console|Promise|unknown|never)\b/,
 	});
 
+	// The keywords TypeScript adds to JavaScript
+	Prism.languages.typescript.keyword.push(
+		/\b(?:abstract|as|declare|implements|is|keyof|readonly|require)\b/,
+		// keywords that have to be followed by an identifier
+		/\b(?:asserts|infer|interface|module|namespace|type)(?!\s*[^\s_${}*a-zA-Z\xA0-\uFFFF])/
+	);
+
 	// doesn't work with TS because TS is too complex
 	delete Prism.languages.typescript['parameter'];
 
@@ -4100,6 +4434,16 @@ Prism.languages.sql = {
 	Prism.languages.typescript['class-name'].inside = typeInside;
 
 	Prism.languages.insertBefore('typescript', 'function', {
+		'decorator': {
+			pattern: /@[$\w\xA0-\uFFFF]+/,
+			inside: {
+				'at': {
+					pattern: /^@/,
+					alias: 'operator'
+				},
+				'function': /^[\s\S]+/
+			}
+		},
 		'generic-function': {
 			// e.g. foo<T extends "bar" | "baz">( ...
 			pattern: /#?(?!\s)[_$a-zA-Z\xA0-\uFFFF](?:(?!\s)[$\w\xA0-\uFFFF])*\s*<(?:[^<>]|<(?:[^<>]|<[^<>]*>)*>)*>(?=\s*\()/,
@@ -4146,7 +4490,7 @@ Prism.languages.sql = {
 		flags = (flags || '').replace(/m/g, '') + 'm'; // add m flag
 		var pattern = /([:\-,[{]\s*(?:\s<<prop>>[ \t]+)?)(?:<<value>>)(?=[ \t]*(?:$|,|]|}|(?:[\r\n]\s*)?#))/.source
 			.replace(/<<prop>>/g, function () { return properties; }).replace(/<<value>>/g, function () { return value; });
-		return RegExp(pattern, flags)
+		return RegExp(pattern, flags);
 	}
 
 	Prism.languages.yaml = {
@@ -4202,4 +4546,3 @@ Prism.languages.sql = {
 	Prism.languages.yml = Prism.languages.yaml;
 
 }(Prism));
-
diff --git a/lib/docs/filters/latex/clean_html.rb b/lib/docs/filters/latex/clean_html.rb
new file mode 100644
index 00000000..5902679f
--- /dev/null
+++ b/lib/docs/filters/latex/clean_html.rb
@@ -0,0 +1,25 @@
+module Docs
+  class Latex
+    class CleanHtmlFilter < Filter
+      def call
+        css('hr, div.header, div.referenceinfo').remove
+        css('div.shortcontents, div.contents, h2.shortcontents-heading, h2.contents-heading, h1.settitle').remove if root_page?
+
+        css('span[id] + h1, span[id] + h2, span[id] + h3, span[id] + h4, span[id] + h5, span[id] + h6').each do |node|
+          id = node.previous['id']
+          node.previous.remove
+          node['id'] = id.sub(/-\d$/, '') if id
+        end
+
+        css('h1, h2, h3, h4').each { |node| node.content = node.content.sub /^[0-9A-Z]+(\.[0-9]+)* /, '' }
+
+        css('pre').each do |node|
+          node.delete 'class'
+          node['data-language'] = 'latex'
+        end
+
+        doc
+      end
+    end
+  end
+end
diff --git a/lib/docs/filters/latex/entries.rb b/lib/docs/filters/latex/entries.rb
new file mode 100644
index 00000000..5270229b
--- /dev/null
+++ b/lib/docs/filters/latex/entries.rb
@@ -0,0 +1,46 @@
+module Docs
+  class Latex
+    class EntriesFilter < Docs::EntriesFilter
+
+      @@entries = Hash.new
+
+      def initialize(*)
+        super
+
+        return unless root_page?
+
+        css('.contents > ul > li').each do |node|
+          lev1 = node.at_css('> a:first-child').text.sub /^[0-9A-Z]+(\.[0-9]+)* /, ''
+          node.css('a').each do |link|
+            href = link['href'].split('#')[0].parameterize.downcase
+            @@entries[href] = lev1
+          end
+        end
+
+      end
+
+      def get_name
+        at_css('h1, h2, h3, h4, h5, h6').content.sub /^[0-9A-Z]+(\.[0-9]+)* /, ''
+      end
+
+      def get_type
+        begin
+          return @@entries[slug.downcase]
+        rescue
+          return "Missing type with slug #{slug}"
+        end
+      end
+
+      def include_default_entry?
+        true
+      end
+
+      def additional_entries
+        return []
+      end
+
+      private
+
+    end
+  end
+end
diff --git a/lib/docs/scrapers/latex.rb b/lib/docs/scrapers/latex.rb
new file mode 100644
index 00000000..e603b72a
--- /dev/null
+++ b/lib/docs/scrapers/latex.rb
@@ -0,0 +1,22 @@
+module Docs
+  class Latex < UrlScraper
+    self.name = 'LaTeX'
+    self.slug = 'latex'
+    self.type = 'simple'
+    self.links = {
+        home: 'https://ctan.org/pkg/latex2e-help-texinfo/'
+    }
+
+    self.base_url = 'http://latexref.xyz'
+
+    html_filters.push 'latex/entries', 'latex/clean_html'
+
+    options[:skip_patterns] = [/^\/dev\//, /\.(dvi|pdf)$/]
+
+    options[:attribution] = <<-HTML
+      &copy; 2007–2018 Karl Berry<br>
+      Public Domain Software
+    HTML
+
+  end
+end
diff --git a/public/icons/docs/latex/16.png b/public/icons/docs/latex/16.png
new file mode 100644
index 00000000..19a8a6a6
Binary files /dev/null and b/public/icons/docs/latex/16.png differ
diff --git a/public/icons/docs/latex/16@2x.png b/public/icons/docs/latex/16@2x.png
new file mode 100644
index 00000000..971833b2
Binary files /dev/null and b/public/icons/docs/latex/16@2x.png differ
diff --git a/public/icons/docs/latex/SOURCE b/public/icons/docs/latex/SOURCE
new file mode 100644
index 00000000..f7dad480
--- /dev/null
+++ b/public/icons/docs/latex/SOURCE
@@ -0,0 +1 @@
+Compiling \LaTeX with pdflatex https://www.tug.org/applications/pdftex/